Which of the following numbers is different from the others?

49, 81, 100, 144This question was previously asked in

MH SET Official Paper 6: Held on 1st Dec 2013

- 49
- 81
- 100
- 144

Option 1 : 49

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81, 100, and 144 are squares of 9, 10, and 12 which are not prime numbers.

Whereas,

49 is the square of 7, which is a prime number.

Hence, “49” is different from others.
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