**Puzzle 1:** What number replaces the question mark?**Answer:** 6

**Explanation:**

5 x 6 + 2 = 32

7 x 6 + 2 = 44

**Puzzle 2:** what does the below mathematical rebus means?**Answer:** For a change

**Puzzle 3:** What number replaces the question mark?**Answer:** (a x b) (a x c) (a x b + a x c – b)

5 + 3 + 2 = (15) (10) (15 + 10 – 3) = 151022

9 + 2 + 4 = (18) (36) (18 + 36 – 2) = 183652

8 + 6 + 3 = (48) (24) (48 + 24 – 6) = 482466

5 + 4 + 5 = (20) (25) (20 + 25 – 4) = 202541

7 + 2 + 5 = (14) (35) (14 + 35 – 2) = 143547

**Puzzle 4:** What number replaces the question mark?

5, 7, 11, 13, 17, ?

**Answer:** 19

All are prime numbers.

**Puzzle 5:** What number replaces the question mark?

IF 1 + 1 = 5

2 + 2 = 20

3 + 3 = 45

Then, 4 + 4 =?

**Answer:** 80

**Explanation:** Multiply the two numbers and then multiply the result by 5.

1 x 1 x 5 = 5

2 x 2 x 5 = 20

3 x 3 x 5 = 45

4 x 4 x 5 = 80