In the following number-pairs, the second number is obtained by applying certain mathematical operations to the first number. Which numbers should replace X and Y so that the pattern followed by the two numbers on the left side of :: is the same as that on the right side of :: ?

(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/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.)

X : 18.8 :: 21 : Y

Question

Question

This question was previously asked in

RRB Technician Grade III Official Paper (Held On: 28 Dec, 2024 Shift 2)

Answer 1

The logic followed here is:

Logic: 1st number + 3.8 = 2nd number.

X : 18.8 :: 21 : Y

For, X

X : 18.8

→ X + 3.8 = 18.8

→ X = 18.8 - 3.8

→ X = 15

Now, for Y

21 : Y

→ 21 + 3.8 = Y

→ 24.8 = Y

Thus, Value of X is 15 and Value of Y is 24.8.

Hence, the correct answer is "Option 4".