**The Main Challenge**

Using all four numbers **1**, **5**, **5** and **10** once each, with + – × ÷ available in each calculation, which **even number** from **2 to 20 inclusive** is impossible to make?

**T****he**** 7puzzle Challenge**

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

The 4th & 6th rows contain the following fourteen numbers:

3 5 10 12 18 20 32 33 35 44 49 54 56 60

What is the sum of the odd numbers?

**T****he Factors Challenge**

**The Mathematically Possible Challenge**

Based on our best-selling arithmetic board game.

Using **3**, **7** and **9 **once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?

8 16 24 32 40 48 56 64 72 80

#*8TimesTable*

**The Target**** Challenge**

Can you arrive at **267** by inserting **2**, **7**, **9**, **11** and **13** into the gaps below?

- ◯×◯×(◯+◯)–◯ = 267

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

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