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85 is related to 15 following a certain logic. Following the same logic, 70 is related to 12. To which of the following is 105 related, following the
Question

85 is related to 15 following a certain logic. Following the same logic, 70 is related to 12. To which of the following is 105 related, 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 1and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

A.

21

B.

23

C.

25

D.

19

Correct option is D

Given,
85 is related to 15 , 70 is related to 12, 105 related to  ?
Logic: Given 1st number divided by 5 then substract 2 from the result.
For 85:15
85 ÷ 5 = 17
17 - 2 = 15 
For 70:12
70 ÷ 5 = 14
14 - 2 = 12 
Similarly, 
For 105: ?
105 ÷ 5 = 21
21 - 2 = 19
So, 105 is related to 19
Thus, the correct option is: (d)

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