Question : Directions: In the following question, select the one that is different from the other three alternatives.
Option 1: 65
Option 2: 126
Option 3: 28
Option 4: 215
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Correct Answer: 215
Solution :
Let's check the options –
First option:
65; 65 – 1 = 64 = 4
3
; 64 is a perfect cube.
Second option:
126; 126 – 1 = 125 = 5
3
; 125 is a perfect cube.
Third option:
28; 28 – 1 = 27 = 3
3
; 27 is a perfect cube.
Fourth option:
215; 215 – 1 = 214; 214 is not a perfect cube.
So, the fourth option differs from the others because its result is not a perfect cube after subtracting one from the given number. Hence, the fourth option is correct.
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