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: (15 – 220 – 215)
Option 2: (10 – 100 – 95)
Option 3: (20 – 400 – 395)
Option 4: (25 – 625 – 620)
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Correct Answer: (15 – 220 – 215)
Solution :
Let's check the options –
First option:
(15 – 220 – 215)→(15)
2
= 225 ≠ 220
Second option:
(10 – 100 – 95)→(10)
2
= 100; 100 – 5 = 95
Third option:
(20 – 400 – 39)→(20)
2
= 400; 400 – 5 = 395
Fourth option:
(25 – 625 – 620)→(25)
2
= 625; 625 – 5 = 620
So, only the first option does not follow the same pattern as followed by the given set of numbers. Hence, the first option is correct.
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