If you've had a go at all the ones above, here are some more ideas to try...

problem

### Exploring Wild & Wonderful Number Patterns

EWWNP means Exploring Wild and Wonderful Number Patterns Created by Yourself! Investigate what happens if we create number patterns using some simple rules.

problem

### Highest and Lowest

Put operations signs between the numbers 3 4 5 6 to make the highest possible number and lowest possible number.

problem

### That number square

Exploring the structure of a number square: how quickly can you put the number tiles in the right place on the grid?

problem

### Count The Digits

In this investigation we are going to count the number of 1s, 2s, 3s etc in numbers. Can you predict what will happen?

problem

### Light the Lights Again

Each light in this interactivity turns on according to a rule. What happens when you enter different numbers? Can you find the smallest number that lights up all four lights?

problem

### Sitting round the party tables

Sweets are given out to party-goers in a particular way. Investigate the total number of sweets received by people sitting in different positions.

problem

### Take three numbers

What happens when you add three numbers together? Will your answer be odd or even? How do you know?

problem

### Magic Vs

Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?

problem

### Prison Cells

There are 78 prisoners in a square cell block of twelve cells. The
clever prison warder arranged them so there were 25 along each wall
of the prison block. How did he do it?

problem

### Junior Frogs

Have a go at this well-known challenge. Can you swap the frogs and toads in as few slides and jumps as possible?

problem

### Button-Up Some More

How many ways can you find to do up all four buttons on my coat? How about if I had five buttons? Six ...?

problem

### Four goodness sake

Use 4 four times with simple operations so that you get the answer 12. Can you make 15, 16 and 17 too?

problem

### Inky Cube

This cube has ink on each face which leaves marks on paper as it is rolled. Can you work out what is on each face and the route it has taken?