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Post-UTME Mathematics 2019 Objective — Question 12

Question 12 of 50 from the Post-UTME Screening (Post-UTME) Mathematics 2019 Objective paper, with the correct answer and a full explanation.

If 2257 is the result of subtracting 4577 from 7056 in base n, find n

A. 8 17/30Correct
B. 9 9/10
C. 10 1/10
D. 11 11/36

Explanation

7056-4577 = 2557 in base n; solving 2557(base n) = 2257(base10) for n gives n=8.

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