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.
Option 1: (1000, 125)
Option 2: (216, 49)
Option 3: (1728, 216)
Option 4: (512, 64)
Correct Answer: (216, 49)
Solution :
Let's check the given options –
First option:
(1000, 125)→(10)
3
= 1000; (10 ÷ 2)
3
= (5)
3
=125
Second option:
(216, 49)→(6)
3
= 216; (6 ÷ 2)
3
= 27 ≠ 49
Third option:
(1728, 216)→(12)
3
= 1728; (12 ÷ 2)
3
= (6)
3
= 216
Fourth option:
(512, 64)→(8)
3
= 512; (8 ÷ 2)
3
= (4)
3
= 64
Therefore, only the second option does not follow the pattern of the other options. Hence, the second option is correct.
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