Investigate the smallest number of moves it takes to turn these mats upside-down if you can only turn exactly three at a time.
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!
Imagine a wheel with different markings painted on it at regular intervals. Can you predict the colour of the 18th mark? The 100th mark?
Arrange any number of counters from these 18 on the grid to make a rectangle. What numbers of counters make rectangles? How many different rectangles can you make with each number of counters?
Can you find just the right bubbles to hold your number?
In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?
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 complete this jigsaw of the multiplication square?
Use the interactivity to sort these numbers into sets. Can you give each set a name?
The planet of Vuvv has seven moons. Can you work out how long it is between each super-eclipse?
If you have only four weights, where could you place them in order to balance this equaliser?
Can you fill in this table square? The numbers 2 -12 were used to generate it with just one number used twice.
Factors and Multiples game for an adult and child. How can you make sure you win this game?
Can you predict when you'll be clapping and when you'll be clicking if you start this rhythm? How about when a friend begins a new rhythm at the same time?
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?
Can you work out how to balance this equaliser? You can put more than one weight on a hook.
Use the interactivity to create some steady rhythms. How could you create a rhythm which sounds the same forwards as it does backwards?
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.
Use the interactivities to complete these Venn diagrams.
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
Got It game for an adult and child. How can you play so that you know you will always win?
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?
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.
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?
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?
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?
How many trains can you make which are the same length as Matt's, using rods that are identical?
If you count from 1 to 20 and clap more loudly on the numbers in the two times table, as well as saying those numbers loudly, which numbers will be loud?
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.
What is the lowest number which always leaves a remainder of 1 when divided by each of the numbers from 2 to 10?
Use this grid to shade the numbers in the way described. Which numbers do you have left? Do you know what they are called?
Complete the magic square using the numbers 1 to 25 once each. Each row, column and diagonal adds up to 65.
An investigation that gives you the opportunity to make and justify predictions.
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 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?
Follow the clues to find the mystery number.
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.
Look at the squares in this problem. What does the next square look like? I draw a square with 81 little squares inside it. How long and how wide is my square?
Kimie and Sebastian were making sticks from interlocking cubes and lining them up. Can they make their lines the same length? Can they make any other lines?
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.
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?
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.
Can you make square numbers by adding two prime numbers together?
How many different sets of numbers with at least four members can you find in the numbers in this box?
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?
Investigate the sum of the numbers on the top and bottom faces of a line of three dice. What do you notice?
56 406 is the product of two consecutive numbers. What are these two numbers?
Have a go at balancing this equation. Can you find different ways of doing it?