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.
Option 1: 15 – 225
Option 2: 19 – 361
Option 3: 9 – 81
Option 4: 4 – 64
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Correct Answer: 4 – 64
Solution :
Let's check the options –
First option:
15 – 225→(15)
2
= 225
Second option:
19 – 361→(19)
2
= 361
Third option:
9 – 81→(9)
2
= 81
Fourth option:
4 – 64→(4)
3
= 64
The fourth option is different from the other three options as it represents the cube of the number, not the square. Hence, the fourth option is correct.
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