Paper 1 · Mathematical Reasoning and Aptitude
UGC NET December 2022 (06.03.2023) Shift-II
What number should replace the question mark in the series: 5, 9, 15, 23, 33, ?
A43
B45 ✓ Correct
C56
D66
Correct answer: (B) 45 — The next number is 45, so the answer is 45.
Explanation
★The next number is 45, so the answer is 45.
★The gaps between the terms increase by two each time.
★From 5 to 9 the gap is 4, then 6, then 8, then 10.
★So the gaps run as 4, 6, 8, 10 and next 12.
★Adding 12 to 33 gives the next term.
★That is 45.
★So the answer is 45.
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