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Question : Directions: The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair.
(NOTE: Operations should be performed on 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 : 215

Option 2: 29 : 201

Option 3: 21 : 145

Option 4: 25 : 177


Team Careers360 16th Jan, 2024
Answer (1)
Team Careers360 17th Jan, 2024

Correct Answer: 25 : 177


Solution : Let's check the options –

First option: 31 : 215→(31 × 7) – 2 = 217 – 2 = 215
Second option: 29 : 201→(29 × 7) – 2 = 203 – 2 = 201
Third option: 21 : 145→(21 × 7) – 2 = 147 – 2 = 145
Fourth option: 25 : 177→(25 × 7) – 2 = 175 – 2 = 173 ≠ 177

So, only the fourth option doesn't follow the same pattern as followed by the given set of numbers. Hence, the fourth option is correct.

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