In this calculation, the box represents a missing digit. What could the digit be? What would the solution be in each case?
Two children made up a game as they walked along the garden paths. Can you find out their scores? Can you find some paths of your own?
Ben and his mum are planting garlic. Use the interactivity to help you find out how many cloves of garlic they might have had.
This challenge focuses on finding the sum and difference of pairs of two-digit numbers.
Find the sum and difference between a pair of two-digit numbers. Now find the sum and difference between the sum and difference! What happens?
Frances and Rishi were given a bag of lollies. They shared them out evenly and had one left over. How many lollies could there have been in the bag?
This challenge is about finding the difference between numbers which have the same tens digit.
How many ways can you find to do up all four buttons on my coat? How about if I had five buttons? Six ...?
This task follows on from Build it Up and takes the ideas into three dimensions!
Can you find all the ways to get 15 at the top of this triangle of numbers? Many opportunities to work in different ways.
Sweets are given out to party-goers in a particular way. Investigate the total number of sweets received by people sitting in different positions.
This challenge, written for the Young Mathematicians' Award, invites you to explore 'centred squares'.
An investigation that gives you the opportunity to make and justify predictions.
Only one side of a two-slice toaster is working. What is the quickest way to toast both sides of three slices of bread?
Tom and Ben visited Numberland. Use the maps to work out the number of points each of their routes scores.
What can you say about these shapes? This problem challenges you to create shapes with different areas and perimeters.
Try out this number trick. What happens with different starting numbers? What do you notice?
Polygonal numbers are those that are arranged in shapes as they enlarge. Explore the polygonal numbers drawn here.
In how many different ways can you break up a stick of 7 interlocking cubes? Now try with a stick of 8 cubes and a stick of 6 cubes.
This activity focuses on rounding to the nearest 10.
What happens when you round these three-digit numbers to the nearest 100?
Find out what a "fault-free" rectangle is and try to make some of your own.
Watch this animation. What do you notice? What happens when you try more or fewer cubes in a bundle?
While we were sorting some papers we found 3 strange sheets which seemed to come from small books but there were page numbers at the foot of each page. Did the pages come from the same book?
Put the numbers 1, 2, 3, 4, 5, 6 into the squares so that the numbers on each circle add up to the same amount. Can you find the rule for giving another set of six numbers?
How many different journeys could you make if you were going to visit four stations in this network? How about if there were five stations? Can you predict the number of journeys for seven stations?
What happens if you join every second point on this circle? How about every third point? Try with different steps and see if you can predict what will happen.
In a Magic Square all the rows, columns and diagonals add to the 'Magic Constant'. How would you change the magic constant of this square?
Find the sum of all three-digit numbers each of whose digits is odd.
Can you make dice stairs using the rules stated? How do you know you have all the possible stairs?
We can arrange dots in a similar way to the 5 on a dice and they usually sit quite well into a rectangular shape. How many altogether in this 3 by 5? What happens for other sizes?
This challenge encourages you to explore dividing a three-digit number by a single-digit number.
Try adding together the dates of all the days in one week. Now multiply the first date by 7 and add 21. Can you explain what happens?
Got It game for an adult and child. How can you play so that you know you will always win?
Are these statements relating to odd and even numbers always true, sometimes true or never true?
This challenge asks you to imagine a snake coiling on itself.
Use two dice to generate two numbers with one decimal place. What happens when you round these numbers to the nearest whole number?
Watch the video of Fran re-ordering these number cards. What do you notice? Try it for yourself. What happens?
Watch this video to see how to roll the dice. Now it's your turn! What do you notice about the dice numbers you have recorded?
Take a look at the video of this trick. Can you perform it yourself? Why is this maths and not magic?
What happens when you round these numbers to the nearest whole number?
This problem challenges you to find out how many odd numbers there are between pairs of numbers. Can you find a pair of numbers that has four odds between them?
Investigate the sum of the numbers on the top and bottom faces of a line of three dice. What do you notice?
Florence, Ethan and Alma have each added together two 'next-door' numbers. What is the same about their answers?
Does this 'trick' for calculating multiples of 11 always work? Why or why not?
Find a route from the outside to the inside of this square, stepping on as many tiles as possible.
How many centimetres of rope will I need to make another mat just like the one I have here?
Can you dissect an equilateral triangle into 6 smaller ones? What number of smaller equilateral triangles is it NOT possible to dissect a larger equilateral triangle into?
Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?
Here are two kinds of spirals for you to explore. What do you notice?