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JAMB Mathematics 2010 Question 8

Question 8

Logarithms

Given that log 2 = 0.3010, log 7 = 0.8451. Evaluate log 112.

  1. A.2.5441
  2. B.2.0491
  3. C.2.1461
  4. D.3.1461
Show the answer and explanation

Answer: B (2.0491)

Explanation

112 = 24 × 7, so log 112 = 4(0.3010) + 0.8451 = 2.0491.