Skip to main content
### Number and algebra

### Geometry and measure

### Probability and statistics

### Working mathematically

### For younger learners

### Advanced mathematics

# Probability - Stage 4

### Which Spinners?

### Last One Standing

### The Better Choice

### Same Number!

### Mathsland National Lottery

### Who's the Winner?

### Chances Are

### Odds and Evens Made Fair

### In a Box

Y*ou may also be interested in this collection of activities from the STEM Learning website, that complement the NRICH activities above.*

Or search by topic

Age 14 to 18

Challenge Level

Can you work out which spinners were used to generate the frequency charts?

Age 14 to 16

Challenge Level

Imagine a room full of people who keep flipping coins until they get a tail. Will anyone get six heads in a row?

Age 14 to 16

Challenge Level

Here are two games you can play. Which offers the better chance of winning?

Age 14 to 16

Challenge Level

If everyone in your class picked a number from 1 to 225, do you think any two people would pick the same number?

Age 14 to 16

Challenge Level

Can you work out the probability of winning the Mathsland National Lottery?

Age 14 to 16

Challenge Level

When two closely matched teams play each other, what is the most likely result?

Age 14 to 16

Challenge Level

Which of these games would you play to give yourself the best possible chance of winning a prize?

Age 14 to 16

Challenge Level

In this follow-up to the problem Odds and Evens, we invite you to analyse a probability situation in order to find the general solution for a fair game.

Age 14 to 16

Challenge Level

Chris and Jo put two red and four blue ribbons in a box. They each pick a ribbon from the box without looking. Jo wins if the two ribbons are the same colour. Is the game fair?

Y