Paper 1 · Mathematical Reasoning and Aptitude
Find the odd number pair: 5 : 26, 6 : 37, 7 : 49, 8 : 65.
A5 : 26
B6 : 37
C7 : 49 ✓ Correct
D8 : 65
Correct answer: (C) 7 : 49 — 7 : 49 is the odd pair, so that is the answer.
Explanation
★7 : 49 is the odd pair, so that is the answer.
★In each pair the second number should be the square of the first plus 1.
★5 squared plus 1 is 26, 6 squared plus 1 is 37 and 8 squared plus 1 is 65.
★So those three pairs follow this rule.
★7 squared plus 1 is 50, not 49, so 7 : 49 breaks the rule.
★So the odd pair is 7 : 49.
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