Question : Directions: In the following question, four number pairs are given. In each pair, the number on the left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three pairs are similar based on the same Logic/Rule/Relation. Select the odd one out from the given alternatives. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their 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.)
Option 1: 13 – 163
Option 2: 9 – 77
Option 3: 18 – 320
Option 4: 24 – 572
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Correct Answer: 13 – 163
Solution :
Let's check each option –
First option:
(13 – 163); 13
2
– 4 = 169 – 4 = 165 ≠ 163
Second option:
(9 – 77); 9
2
– 4 = 81 – 4 = 77
Third option:
(18 – 320); 18
2
– 4 = 324 – 4 = 320
Fourth option:
(24 – 572); 24
2
– 4 = 576 – 4 = 572
So, only the first option is different from the others. Hence, the first option is correct.
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