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JAMB Mathematics 1978 Question 12

Question 12

Logarithms

What is the number whose logarithm to base 10 is 2̄.3482?

  1. A.223.6
  2. B.0.2228
  3. C.2.235
  4. D.22.37
  5. E.0.02229.
Show the answer and explanation

Answer: E (0.02229.)

Explanation

The mantissa .3482 gives the digits 2229 from antilog tables. A characteristic of bar 2 (−2) puts the decimal point to give 0.02229.