Two sets of numbers are given below. In each set of numbers, some mathematical operation on the first number results in the second number. Similarly, some mathematical operation on the second number results in the third number and so on. Which of the following options follows the same set of operations as the given sets?
(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.)
11 – 14 – 8 – 17; 12 – 15 – 9 – 18
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 6 – 9 – 3 – 12.
11 – 14 – 8 – 17 → 11 + 3 = 14; 14 - 6 = 8; 8 + 9 = 17
12 – 15 – 9 – 18 → 12 + 3 = 15; 15 - 6 = 9; 9 + 9 = 18
Similarly, 6 – 9 – 3 – 12 → 6 + 3 = 9; 9 - 6 = 3; 3 + 9 = 12