NIELIT 2023 Feb Scientist D | Section A | Question: 27

Question

Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different from the rest.

• A. $76: 42$
• B. $44: 16$
• C. $55: 25$
• D. $28: 56$

   

Answer 1

76 : 42 → 76 : 7 * 6 (= 42)
44 : 16 → 44 : 4 * 4 ( =16)
55 : 25 → 55 : 5 * 5 (= 25)
28 : 56 → 28 : 2 * 8 ( ! = 56) 

Ans : D – 28 : 56 is different from the rest of the pairs. 

Another approach can be – 56 is divisible by 28 which is not applicable in rest of the pairs. This way also the odd one out is 28 : 56