Surprise!

Surprise!

As you are working on a mathematical task, you might come across something unexpected that takes you by surprise.  

We hope these problems will surprise you and that you enjoy the challenge of explaining what is going on.

Next-door Numbers 

Stage: 1 Challenge Level: Challenge Level:1
Florence, Ethan and Alma have each added together two 'next-door' numbers. What is the same about their answers?

Light the Lights 

Stage: 1 Challenge Level: Challenge Level:2 Challenge Level:2
Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?

How Would We Count? 

Stage: 1 and 2 Challenge Level: Challenge Level:1
An activity centred around observations of dots and how we visualise number arrangement patterns.

Square Surprise 

Stage: 1 and 2 Challenge Level: Challenge Level:1
Why do you think that the red player chose that particular dot in this game of Seeing Squares?

Pouring Problem 

Stage: 2 Challenge Level: Challenge Level:2 Challenge Level:2
What do you think is going to happen in this video clip? Are you surprised?

Consecutive Numbers 

Stage: 2 and 3 Challenge Level: Challenge Level:1
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

Subtraction Surprise 

Stage: 2 and 3 Challenge Level: Challenge Level:1
Try out some calculations. Are you surprised by the results?