Three of the following four are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group?

(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 - Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

Question

Question

This question was previously asked in

SSC CHSL Exam 2023 Tier-I Official Paper (Held On: 02 Aug, 2023 Shift 3)

Answer 1

The logic followed here is:

Logic: (1st number)2 = 2nd number.

Now, checking the options:

Option 1) 16 - 276 → (16)2 = 256 ≠ 276.

Option 2) 21 - 441 → (21)2 = 441.

Option 3) 23 - 529 → (23)2 = 529.

Option 4) 19 - 361 → (19)² = 361

So, '16 - 276' is odd among the given options.

Hence, the correct answer is "Option 1".