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Question : Directions: Select the odd group of numbers.
(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 – 159

Option 2: 9 – 71

Option 3: 5 – 31

Option 4: 17 – 279


Team Careers360 23rd Jan, 2024
Answer (1)
Team Careers360 24th Jan, 2024

Correct Answer: 5 – 31


Solution : Let's check the options –
First option: 13 – 159→(13) 2 = 169; 169 – 10 = 159
Second option: 9 – 71→(9) 2 = 81; 81 – 10 = 71
Third option: 5 – 31→(5) 2 = 25; 25 – 10 = 15 ≠ 31
Fourth option: 17 – 279→(17) 2 = 289; 289 – 10 = 279

Hence, the third option is correct.

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