CA Foundation · Quantitative Aptitude · Number Series, Coding-Decoding and Odd Man Out
Three of the following numbers share a common property. Pick the odd one out: 29, 37, 49, 53
The odd one out is 49. The numbers 29, 37 and 53 are all prime, meaning they are divisible only by 1 and themselves. But 49 is the product of 7 and 7, so it is composite and does not share the property of the other three.
- A29
- B37
- C49Correct
- D53
Explanation
29, 37 and 53 are all prime numbers, having no factors other than 1 and themselves. 49 equals 7×7, so it is composite. Hence 49 is the odd one out.
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