10+ Number Series Puzzles Questions with Answers - 2

Ans: 857

Deduct 28.6 each time

Ans: 16

(33 + 31) ÷ 4 = 16

Ans: 85

Reverse the numbers at the top and add 1 to the digit originally on the left.

Ans: 76

Reverse the first number but discard the highest and lowest digits.

Ans: 50

Add 1, 3, 9, 27, 81, i.e. the amount added is multiplied by 3 each time.