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Post-UTME Mathematics 2011 Objective — Question 10

Question 10 of 11 from the Post-UTME Screening (Post-UTME) Mathematics 2011 Objective paper, with the correct answer and a full explanation.

Given that log10(7)=x and log10(5)=y, evaluate without using tables, log10(35)

A. x+yCorrect
B. x-y+10
C. x-1/y
D. x-y

Explanation

log(35) = log(7x5) = log(7)+log(5) = x+y.

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