Question : Directions: The second number in the given number pairs is obtained by performing certain mathematical operations on the first number. The same operations are followed in all the number pairs, except one. Find that odd number pair.
Option 1: (7, 252)
Option 2: (6, 216)
Option 3: (8, 392)
Option 4: (5, 80)
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Correct Answer: (6, 216)
Solution :
Let's check each option –
First option:
(7, 252)→7 × (7 – 1)
2
= 7 × 6
2
= 7 × 36= 252
Second option:
(6, 216)→6 × (6 – 1)
2
= 6 × 25 = 150 ≠ 216
Third option:
(8, 392)→8 × (8 – 1)
2
= 8 × 7
2
= 8 × 49 = 392
Fourth option:
(5, 80)→5 × (5 – 1)
2
= 5 × 4
2
= 5 × 16 = 80
So, the second option does not follow the same pattern. Hence, the second option is correct.
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