**Today’s Challenge**

Can you replace the 12 ◯’s below with the 12 numbers 1, 1, 2, 2, 3, 3, 4, 4, 5, 6, 7 and 8 so that all four equations work out arithmetically?

◯ + ◯ = ◯

◯ + ◯ = ◯

◯ + ◯ = ◯

◯ + ◯ = ◯

Click **MATHELONA** for details of similar pocket-book challenges.

**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 2nd & 4th rows of the playing board contain the following fourteen numbers:

3 8 10 17 28 32 35 44 48 54 55 60 63 64

What is the difference between the sum of the multiples of 8 and the sum of the multiples of 7?

**Make 130 Challenge**

Can you arrive at 130 by inserting 2, 3, 5 and 10 into the gaps on each line?

- (◯+◯)×◯×◯ = 130
- (◯×◯–◯)×◯ = 130
- ◯²+◯²+◯²–◯² = 130

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

**Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.**