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16 is related to 62 following a certain logic. Following the same logic, 12 is related to 46. To which of the given options is 21 related to, followin
Question

16 is related to 62 following a certain logic. Following the same logic, 12 is related to 46. To which of the given options is 21 related to, following the same logic? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

A.

86

B.

82

C.

80

D.

84

Correct option is B

Given: 
16 is related to 62
12 is related to 46
We need to find the number related to 21.
Logic: 2nd Number = 1st Number ×\times 4 - 2
16 × 4 − 2 = 64 − 2 = 62 
12 × 4 − 2 = 48 − 2 = 46 
 Applying the Same  Logic to 21
21 × 4 − 2 = 84 - 2 = 82
Thus, the correct option is (b) 82 

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