Paper 1 · Mathematical Reasoning and Aptitude
UGC NET December 2022 (28.02.2023) Shift-I
What number should replace the question mark in the given series? 5, 7, 11, 19, 35, 67, ?
A111
B121
C131 ✓ Correct
D141
Correct answer: (C) 131 — The missing number is 131, so the answer is 131.
Explanation
★The missing number is 131, so the answer is 131.
★The gaps between terms double each time.
★From 5 to 7 the gap is 2, then 4, then 8, then 16, then 32.
★So the next gap is 64.
★Adding 64 to the last term 67 gives 131.
★This continues the doubling pattern of the gaps.
★So the missing number is 131.
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