Go through all the options and mark the one which does not belong to the group. 10, 13, 234, 681, 997

Go through all the options and mark the one which does not belong to the group.

10, 13, 234, 681, 997

1. 681
2. 13
3. 234
4. 10

Answer & ExplanationAnswer: Option A
10⇒ 1+0 =1 or 1^2
13⇒ 1+3 = 4 or 2^2
234 ⇒ 2+3+4 = 9 or 3^2
681 ⇒ 6+8+1 = [15]
997 ⇒ 9+9+7 = 25 or 5^2
So the sum of the digits in all the numbers is a perfect square except for 681, hence that is odd.

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Go through all the options and mark the one which does not belong to the group. 10, 13, 234, 681, 997Go through all the options and mark the one which does not belong to the group. 10, 13, 234, 681, 997Go through all the options and mark the one which does not belong to the group. 10, 13, 234, 681, 997