** The Main Challenge**

One of our popular **Mathelona **challenges awaits you; can you complete this by making all four lines work out arithmetically? Fill the 16 gaps with digits **0 to 9**, but each digit can only be inserted a maximum of twice.

◯ + ◯ = 8 = ◯ + ◯

◯ + ◯ = 8 = ◯ – ◯

◯ + ◯ = 8 = ◯ × ◯

◯ + ◯ = 7 = ◯ ÷ ◯

Further details of our pocket book of challenges can be found by clicking **Mathelona**.

**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 1st & 5th rows contain the following fourteen numbers:

2 6 7 9 14 15 16 21 22 40 50 72 81 84

Which three different numbers listed have a sum of 100?

**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 are the FOUR numbers it is possible to make from the list below?

4 8 12 16 20 24 28 32 36 40

#*4TimesTable*

**The Target**** Challenge**

Can you arrive at **263** by inserting **4**, **5**, **6**, **7** and **8** into the gaps below?

- (◯×◯×◯)+◯²+◯ = 263

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

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