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# Surprise!

### Next-door Numbers

### Light the Lights

### How Would We Count?

### Square Surprise

### Pouring Problem

### Consecutive Numbers

### Subtraction Surprise

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Curiosity is triggered when something unexpected happens. These problems aim to draw students in by offering that element of surprise.

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Age 5 to 7

Challenge Level

Florence, Ethan and Alma have each added together two 'next-door' numbers. What is the same about their answers?

Age 5 to 7

Challenge Level

Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?

Age 5 to 11

Challenge Level

An activity centred around observations of dots and how we visualise number arrangement patterns.

Age 5 to 11

Challenge Level

Why do you think that the red player chose that particular dot in this game of Seeing Squares?

Age 7 to 11

Challenge Level

What do you think is going to happen in this video clip? Are you surprised?

Age 7 to 14

Challenge Level

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

Age 7 to 14

Challenge Level

Try out some calculations. Are you surprised by the results?