1000+ Challenging Math Riddles with Answers - 1

Ans: 432, 1296

× 2, × 3, × 2, × 3, × 2, × 3

Ans: 108

Deduct the sum of the digits of the previous number each time.

Ans: 19

Add 1.5, 2.5, 3.5, 4.5, 5.5

Ans: 83.75

Deduct 3.25 each time.

Ans: 945

× 1, × 3, × 5, × 7, × 9