Paper 1 · Mathematical Reasoning and Aptitude
UGC NET December 2021 June 2022 (20.09.2022) Shift-II
Find the wrong number in the series: 3, 8, 15, 24, 34, 48, 63
A34 ✓ Correct
B48
C24
D63
Correct answer: (A) 34 — The answer is 34.
Explanation
★The answer is 34.
★Each term is one less than a perfect square: 2 squared minus 1, 3 squared minus 1, and so on.
★So the series should be 3, 8, 15, 24, 35, 48 and 63.
★The printed series has 34 where 35 is expected.
★So 34 breaks the pattern and is the wrong number.
★The other terms all fit the square-minus-one rule.
★So the answer is 34.
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