**Today’s Challenge**

. . . is an introductory **MATHELONA** challenge taken from the cover of Volume 1 of my pocket book series.

Can you insert the digits 1, 1, 1, 1, 2, 2, 2, 3, 3, 4, 5 and 6 into the 12 gaps below so all three lines work out arithmetically?

◯ + ◯ = 3 = ◯ – ◯

◯ + ◯ = 4 = ◯ × ◯

◯ + ◯ = 5 = ◯ ÷ ◯

**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 3rd & 6th rows of the playing board contain the following fourteen numbers:

5 12 13 18 20 25 33 36 42 45 49 56 66 80

What is the sum of the odd numbers listed above?

**Make 28 Challenge**

Can you arrive at 28 by inserting 2, 4, 6 and 8 into the gaps on each line?

- ◯×◯+◯–◯ = 28
- ◯×◯÷◯+◯ = 28
- ◯×◯+◯×√◯ = 28
- ◯×◯+◯÷◯ = 28
- (◯+◯)×◯–◯ = 28
- (◯+◯)×◯÷◯ = 28
- (◯+◯)×◯+◯ = 28

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

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