Question : Directions: Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
(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 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.)
12 : 20 :: 8 : 12 :: 34 : ?
Option 1: 52
Option 2: 64
Option 3: 48
Option 4: 56
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Correct Answer: 64
Solution :
Given:
12 : 20 :: 8 : 12 :: 34 : ?
Subtract 4 from two times the first number to get the second number of the given pairs.
Like, 12 : 20→(12 × 2) – 4 = 24 – 4 = 20
and, 8 : 12→(8 × 2) – 4 = 16 – 4 = 12
Similarly, for 34 : ?→(34 × 2) – 4 = 68 – 4 = 64
So, 64 is related to 34. Hence, the second option is correct.
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