Is it possible to place 2 counters on the 3 by 3 grid so that there is an even number of counters in every row and every column? How about if you have 3 counters or 4 counters or....?
Can you put the numbers from 1 to 15 on the circles so that no consecutive numbers lie anywhere along a continuous straight line?
You have 4 red and 5 blue counters. How many ways can they be placed on a 3 by 3 grid so that all the rows columns and diagonals have an even number of red counters?
Sweets are given out to party-goers in a particular way. Investigate the total number of sweets received by people sitting in different positions.
Can you work out how to balance this equaliser? You can put more than one weight on a hook.
Can you find the chosen number from the grid using the clues?
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 cube has ink on each face which leaves marks on paper as it is rolled. Can you work out what is on each face and the route it has taken?
Follow the clues to find the mystery number.
Use the numbers and symbols to make this number sentence correct. How many different ways can you find?
Investigate the smallest number of moves it takes to turn these mats upside-down if you can only turn exactly three at a time.
Make your own double-sided magic square. But can you complete both sides once you've made the pieces?
Place the 16 different combinations of cup/saucer in this 4 by 4 arrangement so that no row or column contains more than one cup or saucer of the same colour.
Can you arrange the digits 1, 1, 2, 2, 3 and 3 to make a Number Sandwich?
In this calculation, the box represents a missing digit. What could the digit be? What would the solution be in each case?
A game for 2 people. Take turns placing a counter on the star. You win when you have completed a line of 3 in your colour.
Place the numbers 1 to 10 in the circles so that each number is the difference between the two numbers just below it.
Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.
Number problems at primary level that require careful consideration.
How many trains can you make which are the same length as Matt's and Katie's, using rods that are identical?
There is a long tradition of creating mazes throughout history and across the world. This article gives details of mazes you can visit and those that you can tackle on paper.
This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?
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?
Here are some rods that are different colours. How could I make a yellow rod using white and red rods?
Can you work out some different ways to balance this equation?
What is the best way to shunt these carriages so that each train can continue its journey?
Only one side of a two-slice toaster is working. What is the quickest way to toast both sides of three slices of bread?
There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?
Place the numbers 1 to 8 in the circles so that no consecutive numbers are joined by a line.
What happens when you try and fit the triomino pieces into these two grids?
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
Can you cover the camel with these pieces?
This problem is based on a code using two different prime numbers less than 10. You'll need to multiply them together and shift the alphabet forwards by the result. Can you decipher the code?
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.
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?
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?
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?
The planet of Vuvv has seven moons. Can you work out how long it is between each super-eclipse?
Move from the START to the FINISH by moving across or down to the next square. Can you find a route to make these totals?
Use these head, body and leg pieces to make Robot Monsters which are different heights.
How many triangles can you make using sticks that are 3cm, 4cm and 5cm long?
Design an arrangement of display boards in the school hall which fits the requirements of different people.
Can you shunt the trucks so that the Cattle truck and the Sheep truck change places and the Engine is back on the main line?
How will you go about finding all the jigsaw pieces that have one peg and one hole?
Use the interactivity to help get a feel for this problem and to find out all the possible ways the balls could land.
Try out the lottery that is played in a far-away land. What is the chance of winning?
Can you find all the ways to get 15 at the top of this triangle of numbers? Many opportunities to work in different ways.
In this matching game, you have to decide how long different events take.
What two-digit numbers can you make with these two dice? What can't you make?
This task encourages you to investigate the number of edging pieces and panes in different sized windows.