Paper 1 · Mathematical Reasoning and Aptitude
Find the odd number: 15, 21, 24, 28.
A15
B21
C24
D28 ✓ Correct
Correct answer: (D) 28 — 28 is the odd number, so that is the answer.
Explanation
★28 is the odd number, so that is the answer.
★Check which numbers are divisible by 3.
★15 is 3 times 5, 21 is 3 times 7 and 24 is 3 times 8.
★So 15, 21 and 24 are all multiples of 3.
★28 is not divisible by 3.
★So the odd number is 28.
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