**The Main Challenge**

Another mini-**Mathelona** challenge where you must place the eight digits 1, 1, 1, 2, 2, 3, 4 and 5 into the eight gaps so both lines work out arithmetically:

◯ + ◯ = 3 = ◯ – ◯

◯ + ◯ = 4 = ◯ × ◯

Click **Mathelona** for details of our popular pocket book of 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 1st & 4th rows of the playing board contain the following fourteen numbers:

2 3 9 10 14 15 22 32 35 40 44 54 60 72

Which five numbers listed can be made by adding two others from the list?

**The Mathematically Possible Challenge**

Based on our best-selling arithmetic board game.

Using the three digits **2**, **6** and **9** once each, with + – × ÷ available, which are the only THREE numbers it’s possible to make from the list below?

7 14 21 28 35 42 49 56 63 70

#*7TimesTable*

**The Target Challenge**

Can you arrive at **144** by inserting **4**, **6**, **9** and **12** into the gaps on each line?

- ◯×◯×(◯–◯) = 144
- ◯×◯×double(◯–◯) = 144
- ◯×◯×(◯÷◯)² = 144
- ◯²×(◯+◯–◯) = 144 (2 different ways!)
- ◯×◯+treble(◯×√◯) = 144

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

**Click Paul Godding for details of online maths tuition.**