Question : Directions: Select the option that is related to the third number in the same way as the second number is related to the first number.
2931 : 27 :: 5142 : ?
Option 1: 55
Option 2: 70
Option 3: 10
Option 4: 20
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Correct Answer: 20
Solution :
Given:
2931 : 27 :: 5142 : ?
Multiply the digits of the first term and then divide the resultant term by 2 to obtain the second number.
Here, 2931 : 27 → (2 × 9 × 3 × 1) ÷ 2 = 54 ÷ 2 = 27
Similarly, follow the pattern for 5142 –
(5 × 1 × 4 × 2) ÷ 2 = 40 ÷ 2 = 20
So, 20 is the required term in the given set of numbers. Hence, the fourth option is correct.
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