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# Year 11 Being Collaborative

### Growing Rectangles

### Chances Are

### The Better Choice

### Factorising with Multilink

### Which List Is Which?

### Partly Painted Cube

### Which Is Bigger?

### CD Heaven

### In a Box

### Perception Versus Reality

### Kite in a Square

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Age 11 to 14

Challenge Level

What happens to the area and volume of 2D and 3D shapes when you enlarge them?

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

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

Age 14 to 16

Challenge Level

Can you find out what is special about the dimensions of rectangles you can make with squares, sticks and units?

Age 14 to 16

Challenge Level

Six samples were taken from two distributions but they got muddled up. Can you work out which list is which?

Age 14 to 16

Challenge Level

Jo made a cube from some smaller cubes, painted some of the faces of the large cube, and then took it apart again. 45 small cubes had no paint on them at all. How many small cubes did Jo use?

Age 14 to 16

Challenge Level

Which is bigger, n+10 or 2n+3? Can you find a good method of answering similar questions?

Age 14 to 16

Challenge Level

All CD Heaven stores were given the same number of a popular CD to sell for £24. In their two week sale each store reduces the price of the CD by 25% ... How many CDs did the store sell at each price?

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?

Age 14 to 18

Challenge Level

Infographics are a powerful way of communicating statistical information. Can you come up with your own?

Age 14 to 18

Challenge Level

Can you make sense of the three methods to work out what fraction of the total area is shaded?