**Today’s Challenge**

Read the following ten clues about a particular number:

- it’s less than 100,
- it’s one more than a multiple of 3,
- exactly one of its two digits is prime,
- you get a prime if you reverse its digits,
- it’s not a multiple of 5,
- it’s not a prime number,
- it has exactly four factors,
- it’s not a square number,
- the sum of its digits is prime,
- if you multiply it by 5, the answer is greater than 100.

Can you find the mystery number?

**The 7puzzle Challenge**

The playing board of **the 7puzzle game** is a 7-by-7 grid containing 49 different numbers, ranging from **2 **up to **84**.

The 1st & 3rd rows of the playing board contain the following fourteen numbers:

2 9 13 14 15 22 25 36 40 42 45 66 72 80

How many multiples of 12 are on the list?

**Make 99 Challenge**

Can you arrive at 99 by inserting 2, 3, 5 and 9 into the gaps on each line?

- (◯×◯+◯)×◯ = 99
- ◯×◯×◯+◯² = 99
- (◯+◯)²+◯–◯² = 99
- ◯²×◯²–◯²÷◯ = 99

**Answers **can be found **here**.

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