10+ Maths Riddles and Puzzles with Answers Pdf - 1

Ans: 22 and 24

There are two interwoven sequence. Starting at 19, alternate numbers progress +2, +3, +4, +5. Starting at 20, alternate numbers progress +2, +4, +6, +8.

Ans: 109

Ans: 7

The middle row totals 15, the fourth and sixth rows total 13, the third and seventh rows total 11, the second and eighth rows total 9, therefore the top and bottom rows should be 7.

Ans: 102

Ans: 97.4

The sequence progresses -0.2, -0.6, -1.8, -5.4, -16.2 (ie multiplying the difference by 3 each time.