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.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e (18, 128).
Logic :
2nd number is exactly divisible by the 1st number. Now we can use this logic in all the options and see:
1) (16, 112)
112 ÷ 16 ; R = 0
2) (17, 119)
119 ÷ 17; R = 0
3) (18, 128)
128 ÷ 18; R = 2
4) (15, 105)
105 ÷ 15; R = 0
Since option 3 does not follow the pattern, hence (18, 128) is the different pair.