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
Exploring the structure of a number square: how quickly can you put the number tiles in the right place on the grid?
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? In how many different ways can you do it?
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
Find out what a Deca Tree is and then work out how many leaves there will be after the woodcutter has cut off a trunk, a branch, a twig and a leaf.
1 out of 3
There are nasty versions of this dice game but we'll start with the nice ones...
1 out of 3
What happens when you round these three-digit numbers to the nearest 100?
1 out of 3
Use two dice to generate two numbers with one decimal place. What happens when you round these numbers 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
Four of these clues are needed to find the chosen number on this grid and four are true but do nothing to help in finding the number. Can you sort out the clues and find the number?
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 once and once only. Using the information given, can you replace the stars in the calculation with figures?
2 out of 3
Choose four different digits from 1-9 and put one in each box so that the resulting four two-digit numbers add to a total of 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, look at the green square which contains the numbers 2, 3, 12 and 13. What is the sum of the numbers that are diagonally opposite each other? What do you notice?
3 out of 3
How many solutions can you find to this sum? Each of the different letters stands for a different number.
