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 find the chosen number from the grid using the clues?

In this calculation, the box represents a missing digit. What could the digit be? What would the solution be in each case?

What two-digit numbers can you make with these two dice? What can't you make?

Use two dice to generate two numbers with one decimal place. What happens when you round these numbers to the nearest whole number?

How could you put these three beads into bags? How many different ways can you do it? How could you record what you've done?

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?

Have a go at balancing this equation. Can you find different ways of doing it?

How many ways can you find to do up all four buttons on my coat? How about if I had five buttons? Six ...?

Can you work out some different ways to balance this equation?

In the multiplication calculation, some of the digits have been replaced by letters and others by asterisks. Can you reconstruct the original multiplication?

Can you replace the letters with numbers? Is there only one solution in each case?

Can you order the digits from 1-6 to make a number which is divisible by 6 so when the last digit is removed it becomes a 5-figure number divisible by 5, and so on?

What do the digits in the number fifteen add up to? How many other numbers have digits with the same total but no zeros?

Can you complete this calculation by filling in the missing numbers? In how many different ways can you do it?

Only one side of a two-slice toaster is working. What is the quickest way to toast both sides of three slices of bread?

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?

What happens when you round these three-digit numbers to the nearest 100?

Use the numbers and symbols to make this number sentence correct. How many different ways can you find?

Use these head, body and leg pieces to make Robot Monsters which are different heights.

This challenge focuses on finding the sum and difference of pairs of two-digit numbers.

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?

This challenge is about finding the difference between numbers which have the same tens digit.

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?

Using the statements, can you work out how many of each type of rabbit there are in these pens?

This challenge is to design different step arrangements, which must go along a distance of 6 on the steps and must end up at 6 high.

This problem is based on the story of the Pied Piper of Hamelin. Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether!

When you throw two regular, six-faced dice you have more chance of getting one particular result than any other. What result would that be? Why is this?

Can you fill in this table square? The numbers 2 -12 were used to generate it with just one number used twice.

In the planet system of Octa the planets are arranged in the shape of an octahedron. How many different routes could be taken to get from Planet A to Planet Zargon?

Start with three pairs of socks. Now mix them up so that no mismatched pair is the same as another mismatched pair. Is there more than one way to do it?

These are the faces of Will, Lil, Bill, Phil and Jill. Use the clues to work out which name goes with each face.

If we had 16 light bars which digital numbers could we make? How will you know you've found them all?

Can you put the numbers from 1 to 15 on the circles so that no consecutive numbers lie anywhere along a continuous straight line?

What could the half time scores have been in these Olympic hockey matches?

Tom and Ben visited Numberland. Use the maps to work out the number of points each of their routes scores.

Have a go at this well-known challenge. Can you swap the frogs and toads in as few slides and jumps as possible?

Moira is late for school. What is the shortest route she can take from the school gates to the entrance?

How many rectangles can you find in this shape? Which ones are differently sized and which are 'similar'?

Using all ten cards from 0 to 9, rearrange them to make five prime numbers. Can you find any other ways of doing it?

Ten cards are put into five envelopes so that there are two cards in each envelope. The sum of the numbers inside it is written on each envelope. What numbers could be inside the envelopes?

Lolla bought a balloon at the circus. She gave the clown six coins to pay for it. What could Lolla have paid for the balloon?

El Crico the cricket has to cross a square patio to get home. He can jump the length of one tile, two tiles and three tiles. Can you find a path that would get El Crico home in three jumps?

In this problem it is not the squares that jump, you do the jumping! The idea is to go round the track in as few jumps as possible.

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?

You cannot choose a selection of ice cream flavours that includes totally what someone has already chosen. Have a go and find all the different ways in which seven children can have ice cream.

Nina must cook some pasta for 15 minutes but she only has a 7-minute sand-timer and an 11-minute sand-timer. How can she use these timers to measure exactly 15 minutes?

Investigate the smallest number of moves it takes to turn these mats upside-down if you can only turn exactly three at a time.