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JAMB Mathematics 2003 Question 10

Question 10

Number Bases

The sum of four numbers is 12145. What is the average expressed in base five?

  1. A.114
  2. B.141
  3. C.401
  4. D.411
Show the answer and explanation

Answer: B (141)

Explanation

12145 = 125 + 50 + 5 + 4 = 184. The average is 184 ÷ 4 = 46, and 46 = 1415.