**The Main Challenge**

This *Kakuro*-style question invites you to find various number combinations. List the SEVEN different ways of making **12** when adding together three unique digits from **1 to 9**.

**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 & 3rd rows contain the following fourteen numbers:

2 9 13 14 15 22 25 36 40 42 45 66 72 80

Which number, when doubled, becomes a 3-digit number with two of the digits the same?

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

**The Mathematically Possible Challenge**

Using **3**, **8** and **10 **once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?

100 101 102 103 104 105 106 107 108 109

#*Numbers100to109*

**The Target Challenge**

Can you arrive at **309** by inserting **3**, **4**, **6**, **8** and **9** into the gaps below?

- ((◯+◯)×◯+◯)×half◯ = 309

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

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