Got It game for an adult and child. How can you play so that you know you will always win?
Gabriel multiplied together some numbers and then erased them. Can you figure out where each number was?
Can you explain the strategy for winning this game with any target?
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.
Factors and Multiples game for an adult and child. How can you make sure you win this game?
The clues for this Sudoku are the product of the numbers in adjacent squares.
A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.
Play this game and see if you can figure out the computer's chosen number.
Can you complete this jigsaw of the multiplication square?
Can you find a relationship between the number of dots on the circle and the number of steps that will ensure that all points are hit?
Investigate the smallest number of moves it takes to turn these mats upside-down if you can only turn exactly three at a time.
Here is a machine with four coloured lights. Can you develop a strategy to work out the rules controlling each light?
If you have only four weights, where could you place them in order to balance this equaliser?
Imagine we have four bags containing a large number of 1s, 4s, 7s and 10s. What numbers can we make?
Using the digits 1 to 9, the number 4396 can be written as the product of two numbers. Can you find the factors?
Imagine a wheel with different markings painted on it at regular intervals. Can you predict the colour of the 18th mark? The 100th mark?
Imagine we have four bags containing numbers from a sequence. What numbers can we make now?
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
Find a cuboid (with edges of integer values) that has a surface area of exactly 100 square units. Is there more than one? Can you find them all?
Can you find a way to identify times tables after they have been shifted up or down?
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.
In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?
Can you find any two-digit numbers that satisfy all of these statements?
Use the interactivities to complete these Venn diagrams.
Katie and Will have some balloons. Will's balloon burst at exactly the same size as Katie's at the beginning of a puff. How many puffs had Will done before his balloon burst?
Find the words hidden inside each of the circles by counting around a certain number of spaces to find each letter in turn.
The planet of Vuvv has seven moons. Can you work out how long it is between each super-eclipse?
Work out Tom's number from the answers he gives his friend. He will only answer 'yes' or 'no'.
Norrie sees two lights flash at the same time, then one of them flashes every 4th second, and the other flashes every 5th second. How many times do they flash together during a whole minute?
Given the products of adjacent cells, can you complete this Sudoku?
Can you fill in this table square? The numbers 2 -12 were used to generate it with just one number used twice.
These red, yellow and blue spinners were each spun 45 times in total. Can you work out which numbers are on each spinner?
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?
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?
I throw three dice and get 5, 3 and 2. Add the scores on the three dice. What do you get? Now multiply the scores. What do you notice?
This article for teachers describes how number arrays can be a useful representation for many number concepts.
How can you use just one weighing to find out which box contains the lighter ten coins out of the ten boxes?
Play the divisibility game to create numbers in which the first two digits make a number divisible by 2, the first three digits make a number divisible by 3...
Ben’s class were cutting up number tracks. First they cut them into twos and added up the numbers on each piece. What patterns could they see?
48 is called an abundant number because it is less than the sum of its factors (without itself). Can you find some more abundant numbers?
Does this 'trick' for calculating multiples of 11 always work? Why or why not?
This big box multiplies anything that goes inside it by the same number. If you know the numbers that come out, what multiplication might be going on in the box?
What can you say about the values of n that make $7^n + 3^n$ a multiple of 10? Are there other pairs of integers between 1 and 10 which have similar properties?
Four of these clues are needed to find the chosen number on this grid and four are true but do nothing to help in finding the number. Can you sort out the clues and find the number?
A game in which players take it in turns to choose a number. Can you block your opponent?
Have a go at balancing this equation. Can you find different ways of doing it?
Do you know a quick way to check if a number is a multiple of two? How about three, four or six?
Find some examples of pairs of numbers such that their sum is a factor of their product. eg. 4 + 12 = 16 and 4 × 12 = 48 and 16 is a factor of 48.
Explain why the arithmetic sequence 1, 14, 27, 40, ... contains many terms of the form 222...2 where only the digit 2 appears.
A student in a maths class was trying to get some information from her teacher. She was given some clues and then the teacher ended by saying, "Well, how old are they?"