**Today’s Challenge**

Here’s seven tricky mental teasers to try:

- (18 – 5) – (7 – 17) = ?
- 128 + 294 = ?
- How many seconds are in a quarter-of-an-hour?
- How many degrees are in three-quarters of a circle?
- (16 – 8) × (13 – 8) = ?
- On four consecutive days, you spend £55, £74, £36 and £15. What is the average amount spent per day?
- What is 15% of £8?

**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 & 2nd rows of the playing board contain the following fourteen numbers:

2 8 9 14 15 17 22 28 40 48 55 63 64 72

Which two numbers have a difference of 42?

**Make 107 Challenge**

Can you arrive at 107 by inserting 9, 10, 11 and 12 into the gaps on both lines?

- ◯×◯+◯–◯ = 107 (2 different ways!)
- ◯×◯+(◯–◯)³ = 107

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

**Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.**