Question : Directions: Four number pairs have been given out of which three are alike in some manner and one is different. Select a different one.
(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: 31 – 165
Option 2: 24 – 125
Option 3: 13 – 75
Option 4: 19 – 105
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Correct Answer: 24 – 125
Solution :
Let's check the options –
First option:
31 – 165; 31 × 5 = 155; 155 + 10 = 165
Second option:
24 – 125; 24 × 5 = 120; 120 + 10 = 130 ≠ 125
Third option:
13 – 75; 13 × 5 = 65; 65 + 10 = 75
Fourth option:
19 – 105; 19 × 5 = 95; 95 + 10 = 105
So, the second option does not follow the logic followed by the other three options. Hence, the second option is correct.
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