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Post-UTME Mathematics 2013 Objective — Question 53

Question 53 of 100 from the Post-UTME Screening (Post-UTME) Mathematics 2013 Objective paper, with the correct answer and a full explanation.

The fifth term of the sequence 1, 21, 51, 91, ... is

A. 131
B. 141Correct
C. 151
D. 161

Explanation

Differences 20,30,40 increase by 10, so the next difference is 50: 91+50=141.

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