17 is related to 21 following a certain logic. Following the same logic, 22 is related to 36. To which of the following is 29 related, following the same logic? (NOTE : Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding /deleting /multiplying etc., to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

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Given logic: 17 → 21 
17 × 3 = 51 
51 - 30 = 21

22 → 36 
22 × 3 = 66 
66 - 30 = 36

So the logic is: 
Number × 3 - 30 
Now for 29: 29 × 3 = 87 
87 - 30 = 57 
Answer: 57 
Correct option: 4. 57

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