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WAEC Mathematics 1988 Question 27

Question 27

Logarithms

If log10q = 2.7078, what is q?

  1. A.5102
  2. B.849.9
  3. C.510.2
  4. D.84.99
  5. E.51.02.
Show the answer and explanation

Answer: C (510.2)

Explanation

q = antilog of 2.7078. The mantissa 0.7078 gives 5.102 and the characteristic 2 means multiply by 102: q = 510.2.