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Typical survey sample sizes are about 1000 people. Why is this?

Can you work out the means of these distributions using numerical methods?

Our school dinners offer the same choice each day, and each day I try a new option. How long will it be before I eat the same meal again?

How many marbles need to be taken out to ensure that at least three are of the same colour?

Your partner chooses two beads and places them side by side behind a screen. What is the minimum number of guesses you would need to be sure of guessing the two beads and their positions?

These red, yellow and blue spinners were each spun 45 times in total. Can you work out which numbers are on each spinner?

The class were playing a maths game using interlocking cubes. Can you help them record what happened?