1000+ Puzzles for Interviews with Answers - 1

Ans: A

Two patterns alternate here. The first pattern begins with 10 and adds 2 to each number to arrive at the next; the alternating pattern begins with 34 and subtracts 3 each time.

Ans: E

This is an alternating addition series in which 10 is added, then 5, then 10 and so on.

Ans: 18

Subtract 3 at each time.

Ans: 54

This is an alternation with repetition series in which each number repeats itself and then increase by 7.

Ans: 78

Add 26 each time.