Work out the number of stamps needed to post a parcel.
How many different ways can four people stand in line?
Questions about the Small LEDs used to make up the digits on a calculator display.
Use the flowchart to generate a sequence of numbers. Which number will reach 1 the fastest?
A clock face containing only the number 4. Can you make a clock face containing any other single number?
If all the students in this room shook hands with each other, how many handshakes would there be altogether?
To find out whether a number is happy or not, square each of its digits, add the answers and repeat. If you end up with 1 the number is happy! How many other happy numbers can you find?
A puzzle about the lifts in a hotel which serve floors based on the day of the week.
Add together the dates of all the Thursdays in May this year. Which day sum is largest?
Which numbers when multiplied by the number of letters in the word(s) of the number give square numbers?
Arrange the numbers 1-9 to make three 3 digit numbers that add up to 999.
Investigate three fractions which add together to give one fifth.
Investigate three fractions which add together to give one ninth.
Find other numbers that can be changed to 1 on a calculator using only the 4 key and any operation.
A number puzzle suitable for children with a wide range of abilities.
Calculate the areas of all the possible quadrilaterals that can be constructed by joining together dots on this grid.
Arrange the numbers on the grid of squares so that the totals along each line of three squares are equal.
Place the numbers on the triangle so that the totals along each of the sides are equal.
Find calculations which written back to front give the same answer.
An interactive workspace in which to make shapes using square tiles with given areas and perimeters.
How many different shapes with an area of 2 square units can you make by joining dots on this grid with straight lines?
A logic challenge requiring a strategy to update each of the numbers in a grid.
An interactive function machine for patterns, numbers and equations.
An online tool to draw, display and investigate graphs of many different kinds.
Choose the amount of liquid from each bottle needed to make the watermelon grow as big as possible.
To find out whether a number is happy square each of its digits, add the answers and repeat. End in one and the number is happy.
Can you make four litres if you only have seven and five litre jugs?
A drag and drop activity challenging you to arrange the digits to produce the largest possible product.
An investigation of the minimum number of moves required to make the blue and green frogs swap places.
Investigate this amazing mind reading performance based on simple mathematical principles.
Investigate the properties of the Mystic Rose by using this interactive diagram.
A number patterns investigation involving prisoners and prison guards.
The traditional River Crossing challenge. Can you do it in the smallest number of moves?
Use just six keys on your calculator to make a given total. How many different ways can it be done?
How many different ways can you make a given total with Thai coins?
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