**The Main** **Challenge**

This is a typical number puzzle from fellow designer, Kojiro Tominga, who is based in Yokohama, Japan.

Using **5**, **5**, **5** and **5**, with + – × ÷ available, can you make each of the target numbers **5**, **10**, **15**, **20**, **25**, **30** and **35**?

**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 4th & 5th rows contain the following fourteen numbers:

3 6 7 10 16 21 32 35 44 50 54 60 81 84

What is double the lowest multiple of 9 found on the list?

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

**The Mathematically Possible Challenge**

Using **8**, **10** and **12 **once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?

100 102 104 106 108 110 112 114 116 118 120

#*EvenNumbers*

**The Target**** ****Challenge**

Can you arrive at **297** by inserting **1**, **2**, **3**, **4** and **5** into the gaps below?

- ◯²×(◯+◯)×(◯²–◯) = 297

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

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