JAMB Economics 2005 past questions and answers

46 questions. Try each one, then open the answer to check yourself and read the explanation.

Question 1

Market Structures

A profit maximizing monopolist should produce within the range where his demand is

  1. A.inelastic
  2. B.elastic
  3. C.infinitely elastic
  4. D.unitarily elastic
Show the answer and explanation

Answer: B (elastic)

Explanation

A monopolist sets MR = MC, and MC is positive, so MR must be positive. MR is positive only where demand is elastic.

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Question 2

National Income

In the circular flow diagram above, the arrow marked K indicates

Diagram for this question
  1. A.the flow of capital goods
  2. B.payments to factors of production
  3. C.payments for goods and services
  4. D.the flow of economic rent
Show the answer and explanation

Answer: C (payments for goods and services)

Explanation

Use the diagram. Goods and services flow from firms to households, and K is the money flowing the other way, from households to firms, to pay for them.

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Question 3

Financial Institutions

The savings deposit in a commercial bank is called

  1. A.capital
  2. B.fund
  3. C.near money
  4. D.call money
Show the answer and explanation

Answer: C (near money)

Explanation

A savings deposit is not spent directly like cash but can quickly be turned into cash, so it is near money (quasi-money).

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Question 4

Market Structures

Output(kg) | 240 | 450 | 580 | 630
MR(₦) | 75 | 48 | –40 | –22
MC(₦) | 41 | 48 | 77 | 20
Given the table above, what is the firm's short-run profit-maximizing output?

  1. A.450g
  2. B.630 kg
  3. C.240 kg
  4. D.580 kg
Show the answer and explanation

Answer: A (450g)

Explanation

Profit is greatest where marginal revenue equals marginal cost. MR = MC = ₦48 at an output of 450 kg.

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Question 5

Financial Institutions

The regulatory authority of the capital market in Nigeria is the

  1. A.Central Bank
  2. B.Securities and Exchange Commission
  3. C.Nigerian Deposit Insurance Corporation
  4. D.Stock Exchange Market
Show the answer and explanation

Answer: B (Securities and Exchange Commission)

Explanation

The Securities and Exchange Commission (SEC) regulates and supervises Nigeria's capital market.

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Question 6

Market Structures

In the long run, the equilibrium point of a monopolistic firm is a point where the

  1. A.marginal cost cruve is tangential to the average fixed cost curve
  2. B.demand curve is tangential to the average variable cost curve
  3. C.supply curve is tangential to the marginal cost curve
  4. D.demand curve is tangential to the average cost curve
Show the answer and explanation

Answer: D (demand curve is tangential to the average cost curve)

Explanation

In the long run new firms enter until only normal profit is left, so the firm's demand (AR) curve just touches its average cost curve.

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Question 7

National Income

Given that Y = C + I, where C = 50 + 0.75 and I = N45m, what is the equilibrium level of income?

  1. A.N380 m
  2. B.N 20 m
  3. C.N180 m
  4. D.N200 m
Show the answer and explanation

Answer: A (N380 m)

Explanation

Taking C = 50 + 0.75Y: Y = 50 + 0.75Y + 45, so 0.25Y = 95 and Y = 380 (₦380 million).

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Question 8

Financial Institutions

Above full employment level, an expansionary monetary policy will lead to a

  1. A.fall in aggregate demand
  2. B.decrease in aggregate supply
  3. C.fall in the inflation rate
  4. D.rise in the inflation rate
Show the answer and explanation

Answer: D (rise in the inflation rate)

Explanation

At full employment output cannot rise further, so extra money only raises spending and pushes prices up.

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Question 9

Market Structures

A major assumption in a perfectly competitive market is that

  1. A.the number of buyers and sellers is small
  2. B.individuals cannot influence prices
  3. C.the quality of products remains the same
  4. D.prices will always remain constant
Show the answer and explanation

Answer: B (individuals cannot influence prices)

Explanation

There are so many buyers and sellers that no single one can affect the market price; each is a price taker.

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Question 10

Financial Institutions

A discount house is a market where

  1. A.various bills are exchanged
  2. B.short-term and medium-term loans are obtained
  3. C.shares are bought and sold
  4. D.short-term loans are obtained
Show the answer and explanation

Answer: A (various bills are exchanged)

Explanation

A discount house buys and sells (discounts) bills such as treasury bills and bills of exchange.

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Question 11

Money and Inflation

Idle cash balances are held for

  1. A.planned purchases
  2. B.the purchase of bonds
  3. C.the purchase of shares
  4. D.unplanned purchases
Show the answer and explanation

Answer: B (the purchase of bonds)

Explanation

Idle balances are money held for the speculative motive: waiting to buy bonds when their prices fall (interest rates rise).

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Question 12

National Income

In a particular year, the sum of the value added in each sector of the economy was N4550 million. The amount represents the GNP measured by the

  1. A.factor-price approach
  2. B.output approach
  3. C.income approach
  4. D.expenditure approach
Show the answer and explanation

Answer: B (output approach)

Explanation

Adding up the value added by every sector of the economy is the output (product) method of measuring national income.

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Question 13

Population

Population density is described as the

  1. A.average number of people per square kilometre
  2. B.average number of people in a country
  3. C.total population excluding migration
  4. D.total population including net migration
Show the answer and explanation

Answer: A (average number of people per square kilometre)

Explanation

Population density = population ÷ land area, i.e. the average number of people per square kilometre.

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Question 14

Agriculture

The short-run inelasticity of supply of agricultural produce causes

  1. A.stability in prices
  2. B.a steady rise in prices
  3. C.a steady decline in prices
  4. D.instability in prices
Show the answer and explanation

Answer: D (instability in prices)

Explanation

Farm supply cannot adjust quickly, so changes in demand or harvests cause big swings in price: prices are unstable.

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Question 15

Natural Resources and Petroleum

The major contribution of the petroleum industry to the Nigerian economy is the

  1. A.generation of revenue for the oil companies
  2. B.provision of employment opportunities for communities
  3. C.generation of revenue for government
  4. D.promotion of industrial harmony
Show the answer and explanation

Answer: C (generation of revenue for government)

Explanation

Oil provides most of the Nigerian government's revenue and foreign exchange.

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Question 16

Labour Market

During a conflict between management and workers, the union's bargaining power is based on

  1. A.work-to-rule
  2. B.negotiation
  3. C.picketing
  4. D.management decision
Show the answer and explanation

Answer: B (negotiation)

Explanation

A union's strength comes from collective bargaining, negotiating with employers on behalf of all its members.

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Question 18

Population

If the death rate of a country is 52% and the growth rate is 12%, what is the birth rate of the country

  1. A.48%
  2. B.64%
  3. C.40%
  4. D.52%
Show the answer and explanation

Answer: B (64%)

Explanation

Growth rate = birth rate − death rate, so birth rate = growth rate + death rate = 12% + 52% = 64%.

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Question 19

Agriculture

Agricultural backward-linkage effect means the establishment of

  1. A.subsidiary industries to increase the number of industries
  2. B.main industries to increase output
  3. C.industries to reduce imports
  4. D.subsidiary industries to feed the main industry
Show the answer and explanation

Answer: D (subsidiary industries to feed the main industry)

Explanation

Backward linkage means setting up suppliers (such as farms) that provide raw materials to the main industry.

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Question 20

Natural Resources and Petroleum

The distinction between onshore and offshore operations in oil exploration lies in the

  1. A.location of sites
  2. B.output generated
  3. C.size of production
  4. D.techniques of production
Show the answer and explanation

Answer: A (location of sites)

Explanation

Onshore operations are on land and offshore operations are at sea; the difference is where the sites are located.

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Question 21

Theory of Production

Long-run production is called

  1. A.diminishing returns to scale
  2. B.returns to scale
  3. C.external economies of scale
  4. D.economies of scale
Show the answer and explanation

Answer: B (returns to scale)

Explanation

In the long run all inputs change together, and the effect on output is called returns to scale.

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Question 22

Market Structures

For a firm to break even in the long run, the marginal cost curve must cut the

  1. A.average variable cost curve at its highest point
  2. B.average cost curve at any two lowest point
  3. C.total cost cure at its lowest point
  4. D.average cost curve at its lowest point
Show the answer and explanation

Answer: D (average cost curve at its lowest point)

Explanation

The MC curve always cuts the average cost curve at its lowest point; when price equals this minimum average cost the firm just breaks even.

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Question 23

Theory of Supply

An increase in the quantity supplied of a commodity suggests

  1. A.a leftward shift of the supply curve
  2. B.a rightward shift of the supply curve
  3. C.a movement along the supply curve
  4. D.an increase in elasticity of supply
Show the answer and explanation

Answer: C (a movement along the supply curve)

Explanation

A change in quantity supplied is caused by a change in the good's own price and is a movement along the supply curve.

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Question 24

Theory of Costs and Revenue

An example of a long-run cost of a firm is

  1. A.fuel and maintenance cost
  2. B.the planned size of plant and equipment
  3. C.the existing size of plant and equipment
  4. D.rent on buildings
Show the answer and explanation

Answer: B (the planned size of plant and equipment)

Explanation

In the long run a firm can choose any size of plant, so long-run costs relate to the planned plant and equipment. Rent on buildings is a fixed cost of the short run.

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Question 25

Theory of Production

In a car assembly plant, division of labour is demonstrated by

  1. A.assigning each worker to a specific activity
  2. B.assigning each worker a given number to produce
  3. C.increasing the daily output
  4. D.producing a specific model
Show the answer and explanation

Answer: A (assigning each worker to a specific activity)

Explanation

Division of labour means splitting production into tasks and giving each worker one specific task.

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Question 26

Market Structures

Under perfect competition, the short-run supply curve of a firm is determined by its

  1. A.total cost curve
  2. B.marginal cost curve
  3. C.average fixed cost curve
  4. D.average cost curve
Show the answer and explanation

Answer: B (marginal cost curve)

Explanation

A competitive firm produces where price = marginal cost, so its supply curve is its MC curve above average variable cost.

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Question 27

Price Determination

The hoarding of goods is usually experienced when

  1. A.supply is greater than demand
  2. B.the market price is above the equilibrium price
  3. C.demand is greater than supply
  4. D.excess demand is greater than excess supply
Show the answer and explanation

Answer: C (demand is greater than supply)

Explanation

When goods are scarce (demand exceeds supply), traders hold them back expecting higher prices: hoarding.

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Question 28

Theory of Production

The technical relationship between input combination and maximum attainable output is called

  1. A.a production function
  2. B.an indifference curve
  3. C.an isocost
  4. D.an isoquant
Show the answer and explanation

Answer: A (a production function)

Explanation

A production function shows the maximum output that can be produced from each combination of inputs.

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Question 29

Theory of Consumer Behaviour

If the marginal utility of the last unit of commodity X at N2 is 16 and that of commodity Y at N4 is 24, the consumer will be at equilibrium when

  1. A.the price-quantity ratios are equal
  2. B.equal amounts of X and Y are consumed
  3. C.less of Y and more of X are consumed
  4. D.less of X and more of Y are consumed
Show the answer and explanation

Answer: C (less of Y and more of X are consumed)

Explanation

X gives 16 ÷ 2 = 8 utils per naira and Y gives 24 ÷ 4 = 6. To equalise MU per naira, the consumer buys more X (lowering its MU) and less Y (raising its MU).

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Question 30

Price Determination

A buyer who haggles in the market is applying the principle of

  1. A.choice
  2. B.price mechanism
  3. C.opportunity cost
  4. D.utility maximization
Show the answer and explanation

Answer: B (price mechanism)

Explanation

Haggling is bargaining between buyer and seller until a price is agreed, which is the price mechanism at work.

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Question 31

Theory of Demand

An inverse relationship between price and quantity demanded implies that

  1. A.the two variables change in opposite directions
  2. B.the two variables change in the same direction
  3. C.only one variable changes
  4. D.the two variables remain unchanged
Show the answer and explanation

Answer: A (the two variables change in opposite directions)

Explanation

Inverse means when one rises the other falls, i.e. they move in opposite directions.

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Question 32

Theory of Consumer Behaviour

When the marginal utility of a commodity is zero, the total utility is

  1. A.at its minimum
  2. B.upward-sloping
  3. C.downward-sloping
  4. D.at its maximum
Show the answer and explanation

Answer: D (at its maximum)

Explanation

Total utility rises while marginal utility is positive and stops rising when marginal utility reaches zero, so it is at its maximum.

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Question 33

Economic Systems

Economic freedom is a basic feature of

  1. A.a market economy
  2. B.an industrialized economy
  3. C.a planned economy
  4. D.a developed economy
Show the answer and explanation

Answer: A (a market economy)

Explanation

In a market (capitalist) economy individuals are free to own property, choose jobs and run businesses.

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Question 34

Tools of Economic Analysis

Use the table below to answer the question.
Price (₦) | Quantity(kg)
40 | 6
48 | 5
55 | 4
60 | 3
70 | 2
What is the median quantity?

  1. A.5 kg
  2. B.6 kg
  3. C.3 kg
  4. D.4 kg
Show the answer and explanation

Answer: D (4 kg)

Explanation

Arranged in order the quantities are 2, 3, 4, 5, 6; the middle value is 4 kg.

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Question 35

Tools of Economic Analysis

Use the table below to answer the question.
Price (₦) | Quantity(kg)
40 | 6
48 | 5
55 | 4
60 | 3
70 | 2
Find the mean price of the distribution

  1. A.N54
  2. B.N51
  3. C.N56
  4. D.N59
Show the answer and explanation

Answer: B (N51)

Explanation

Weight each price by its quantity: (40×6 + 48×5 + 55×4 + 60×3 + 70×2) ÷ (6+5+4+3+2) = 1020 ÷ 20 = ₦51.

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Question 36

Elasticity

If elasticity of demand is greater than 1 and less than infinity, demand is said to be

  1. A.elastic
  2. B.perfectly inelastic
  3. C.inelastic
  4. D.perfectly elastic
Show the answer and explanation

Answer: A (elastic)

Explanation

Elasticity above 1 means demand is elastic; it is perfectly elastic only when elasticity is infinite.

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Question 37

Theory of Production

In economics, production takes place only when

  1. A.producers sell to retailers
  2. B.value has been added to a commodity
  3. C.modern equipment is used
  4. D.consumption has taken place
Show the answer and explanation

Answer: B (value has been added to a commodity)

Explanation

In economics, production means creating or adding value (utility) to goods and services.

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Question 38

Public Finance

The monetization policy of the Nigerian government is aimed at

  1. A.encouraging public servants toretire early and become self-employed
  2. B.transferring government's properties to retired public servants
  3. C.reducing government's burden on the provision of fringe benefits to public servants
  4. D.helping government recover properties held by public servants
Show the answer and explanation

Answer: C (reducing government's burden on the provision of fringe benefits to public servants)

Explanation

Monetisation pays public servants cash allowances in place of free houses, cars and other fringe benefits, cutting government's cost of providing them.

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Question 40

Economic Growth and Development

The problem of planning in Nigeria is mainly in the

  1. A.implementation of the plans
  2. B.appraisal of the plans
  3. C.allocation of scarce resources
  4. D.articulation of the plans
Show the answer and explanation

Answer: A (implementation of the plans)

Explanation

Nigeria's plans were usually well drawn up but poorly carried out, so the main problem is implementation.

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Question 42

International Trade

Use the table below to answer the question.
Country | Groundnuts(unit) | Cocoa (units)
Nigeria | 8,000 | 1,000
Ghana | 1,000 | 8,000
Total production | 9,000 | 9,000
Applying the law of comparative costs, how many units of groundnuts will Nigeria produce?

  1. A.7, 000 units
  2. B.16,000 units
  3. C.9,000 units
  4. D.8,000 units
Show the answer and explanation

Answer: B (16,000 units)

Explanation

Nigeria is far better at groundnuts, so it moves all its resources into them. Resources that gave 8,000 groundnuts plus 1,000 cocoa now give 2 × 8,000 = 16,000 groundnuts.

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Question 43

International Trade

Use the table below to answer the question.
Country | Groundnuts(unit) | Cocoa (units)
Nigeria | 8,000 | 1,000
Ghana | 1,000 | 8,000
Total production | 9,000 | 9,000
The difference in each country's total output on specialization is

  1. A.16,000 units
  2. B.9,000 units
  3. C.8,000 units
  4. D.7,000 units
Show the answer and explanation

Answer: D (7,000 units)

Explanation

With specialisation Nigeria makes 16,000 groundnuts (and Ghana 16,000 cocoa), against 9,000 of each before: a gain of 16,000 − 9,000 = 7,000 units.

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Question 45

Economic Growth and Development

Economic growth is different from economic development because economic growth

  1. A.describes expansion and change
  2. B.is measurable but not objective
  3. C.describes expansion and not change
  4. D.is not measurable but objective
Show the answer and explanation

Answer: C (describes expansion and not change)

Explanation

Growth is just a rise in output (expansion); development also involves structural and social change such as better health and education.

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Question 46

Balance of Payments and Exchange Rates

A long-term capital outflow is recorded in the balance of payment as a

  1. A.credit on the capital account
  2. B.credit on the current account
  3. C.debit on the current account
  4. D.debit on the capital account
Show the answer and explanation

Answer: D (debit on the capital account)

Explanation

Long-term investment flowing out of the country is a payment abroad on the capital account, so it is a debit there.

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Question 47

Business Organisations

Business organizations in which the owners' personal property may be forfeited in the event of bankruptcy are

  1. A.partnerships and limited liability companies
  2. B.partnerships and sole proprietorships
  3. C.cooperatives and limited liability companies
  4. D.corporations and sole proprietorships
Show the answer and explanation

Answer: B (partnerships and sole proprietorships)

Explanation

Sole proprietors and (ordinary) partners have unlimited liability, so their personal property can be taken to pay business debts.

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Question 48

Money and Inflation

The factor responsible for the current inflationary pressures in Nigeria is the

  1. A.exchange rate depreciation
  2. B.increase in exports
  3. C.low per capita income
  4. D.budget surplus
Show the answer and explanation

Answer: A (exchange rate depreciation)

Explanation

When the naira loses value, imported goods and inputs cost more, pushing up prices.

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Question 49

Public Finance

If government increases its expenditure on public works, the desired effect is

  1. A.a reduction in the use of capital equipment
  2. B.an increase in the level of emploment
  3. C.an increase in the level of inflation
  4. D.an increase in the use of capital equipment
Show the answer and explanation

Answer: B (an increase in the level of emploment)

Explanation

Public works such as roads and buildings create jobs, so the aim is to raise employment.

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Question 50

International Economic Organisations

An institution that regulates trade relations among members is the

  1. A.ADB
  2. B.OPEC
  3. C.EU
  4. D.IMF
Show the answer and explanation

Answer: C (EU)

Explanation

The European Union is a common market that sets the rules of trade among its member countries. OPEC regulates oil output and prices, not trade relations.

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