This is part of our collection of favourite rich tasks arranged by topic.
If you are a teacher, you can find the whole collection on our Primary Curriculum teacher page.
Alternatively, if you are a student, you'll find the same problems on our Primary Curriculum student page.
1 out of 3
Can you complete this jigsaw of the 100 square?
1 out of 3
How quickly can you put the number tiles in the right place on the number square?
1 out of 3
Which is quicker, counting up to 30 in ones or counting up to 300 in tens? Why?
1 out of 3
Can you replace the letters with numbers? Is there only one solution in each case?
1 out of 3
Do you agree with Badger's statements? Is Badger's reasoning 'watertight'? Why or why not?
1 out of 3
Can you complete this calculation by filling in the missing numbers?
1 out of 3
Can you work out some different ways to balance this equation?
1 out of 3
What happens when you round these numbers to the nearest whole number?
1 out of 3
Have a go at balancing this equation. Can you find different ways of doing it?
1 out of 3
A Deca Tree has 10 trunks, and on each trunk are 10 branches, and on each branch are 10 twigs...
1 out of 3
Will you play the nice or the nasty version of this dice game?
1 out of 3
What happens when you round these three-digit numbers to the nearest 100?
1 out of 3
What happens when you round these decimals to the nearest whole number?
1 out of 3
There are six numbers written in five different scripts. Can you sort out which is which?
1 out of 3
Which of these clues are needed to find the number? Which clues aren't helpful?
1 out of 3
This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?
2 out of 3
This multiplication uses each of the digits 0 - 9. Can you work out where each digit goes?
2 out of 3
Can you use four digits to make four two-digit numbers that add to 100?
2 out of 3
Try out this number trick. What happens with different starting numbers? What do you notice?
1 out of 3
Try out these calculations. Are you surprised by the results?
1 out of 3
Use your knowledge of place value to try to win this game. How will you maximise your score?
1 out of 3
In these multiplication and division games, you'll need to think strategically to get closest to the target.
1 out of 3
In these addition and subtraction games, you'll need to think strategically to get closest to the target.
2 out of 3
In this 100 square, what is the sum of the numbers that are diagonally opposite each other?
3 out of 3
How many solutions can you find to this sum? Each of the different letters stands for a different number.
