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Post-UTME Mathematics 2006 Objective — Question 10

Question 10 of 10 from the Post-UTME Screening (Post-UTME) Mathematics 2006 Objective paper, with the correct answer and a full explanation.

If 52(base n) - 24(base n) = 25(base n), then n is

A. 4
B. 7Correct
C. 11
D. 5

Explanation

(5n+2)-(2n+4)=(2n+5) gives 3n-2=2n+5, so n=7.

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