What do the numbers shaded in blue on this hundred square have in common? What do you notice about the pink numbers? How about the shaded numbers in the other squares?
Can you order the digits from 1-3 to make a number which is divisible by 3 so when the last digit is removed it becomes a 2-figure number divisible by 2, and so on?
Can you work out the arrangement of the digits in the square so that the given products are correct? The numbers 1 - 9 may be used once and once only.
Find the squares that Froggie skips onto to get to the pumpkin patch. She starts on 3 and finishes on 30, but she lands only on a square that has a number 3 more than the square she skips from.
How many different shaped boxes can you design for 36 sweets in one layer? Can you arrange the sweets so that no sweets of the same colour are next to each other in any direction?
Ben and his mum are planting garlic. Use the interactivity to help you find out how many cloves of garlic they might have had.
How many trains can you make which are the same length as Matt's, using rods that are identical?
Investigate the smallest number of moves it takes to turn these mats upside-down if you can only turn exactly three at a time.
In this maze of hexagons, you start in the centre at 0. The next hexagon must be a multiple of 2 and the next a multiple of 5. What are the possible paths you could take?
Can you find the chosen number from the grid using the clues?
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?
Can you work out how to balance this equaliser? You can put more than one weight on a hook.
Can you fill in this table square? The numbers 2 -12 were used to generate it with just one number used twice.
The planet of Vuvv has seven moons. Can you work out how long it is between each super-eclipse?
Suppose we allow ourselves to use three numbers less than 10 and multiply them together. How many different products can you find? How do you know you've got them all?
If you have only four weights, where could you place them in order to balance this equaliser?
Can you make square numbers by adding two prime numbers together?
The discs for this game are kept in a flat square box with a square hole for each disc. Use the information to find out how many discs of each colour there are in the box.
There is a clock-face where the numbers have become all mixed up. Can you find out where all the numbers have got to from these ten statements?
Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?
Starting with the number 180, take away 9 again and again, joining up the dots as you go. Watch out - don't join all the dots!
A game for 2 or more people. Starting with 100, subratct a number from 1 to 9 from the total. You score for making an odd number, a number ending in 0 or a multiple of 6.
Can you work out some different ways to balance this equation?
Complete the magic square using the numbers 1 to 25 once each. Each row, column and diagonal adds up to 65.
Can you complete this calculation by filling in the missing numbers? In how many different ways can you do it?
Have a go at balancing this equation. Can you find different ways of doing it?
Follow the clues to find the mystery number.
Got It game for an adult and child. How can you play so that you know you will always win?
This activity focuses on doubling multiples of five.
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
An environment which simulates working with Cuisenaire rods.
Can you complete this jigsaw of the multiplication square?
In a square in which the houses are evenly spaced, numbers 3 and 10 are opposite each other. What is the smallest and what is the largest possible number of houses in the square?
An investigation that gives you the opportunity to make and justify predictions.
A game for 2 people using a pack of cards Turn over 2 cards and try to make an odd number or a multiple of 3.
On a farm there were some hens and sheep. Altogether there were 8 heads and 22 feet. How many hens were there?
Imagine a wheel with different markings painted on it at regular intervals. Can you predict the colour of the 18th mark? The 100th mark?
Yasmin and Zach have some bears to share. Which numbers of bears can they share so that there are none left over?
Number problems at primary level that may require determination.
When Charlie asked his grandmother how old she is, he didn't get a straightforward reply! Can you work out how old she is?
Help share out the biscuits the children have made.
Investigate the sum of the numbers on the top and bottom faces of a line of three dice. What do you notice?
"Ip dip sky blue! Who's 'it'? It's you!" Where would you position yourself so that you are 'it' if there are two players? Three players ...?
Factor track is not a race but a game of skill. The idea is to go round the track in as few moves as possible, keeping to the rules.
In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?
Number problems at primary level to work on with others.
Can you place the numbers from 1 to 10 in the grid?
In this problem we are looking at sets of parallel sticks that cross each other. What is the least number of crossings you can make? And the greatest?
Are these domino games fair? Can you explain why or why not?
If there is a ring of six chairs and thirty children must either sit on a chair or stand behind one, how many children will be behind each chair?