Paper 1 · Mathematical Reasoning and Aptitude
UGC NET December 2022 (05.03.2023) Shift-I
What number should replace the question mark in the series: 125, 129, 120, 136, 111, 147, ?
A183
B258
C196
D98 ✓ Correct
Correct answer: (D) 98 — The next number is 98, so the answer is 98.
Explanation
★The next number is 98, so the answer is 98.
★The series moves by adding and subtracting growing square numbers.
★From 125 it adds 4 to get 129, then subtracts 9 to get 120.
★It adds 16 to get 136, then subtracts 25 to get 111.
★It adds 36 to get 147, so the next step subtracts 49.
★147 minus 49 is 98.
★So the answer is 98.
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