Odd and even numbers
problem
Favourite
More numbers in the ring
If there are 3 squares in the ring, can you place three different numbers in them so that their differences are odd? Try with different numbers of squares around the ring. What do you notice?
problem
Favourite
Even and odd
This activity is best done with a whole class or in a large group. Can you match the cards? What happens when you add pairs of the numbers together?
problem
Favourite
Number differences
Place the numbers from 1 to 9 in the squares below so that the difference between joined squares is odd. How many different ways can you do this?
problem
Favourite
I like ...
Mr Gilderdale is playing a game with his class. What rule might he have chosen? How would you test your idea?
problem
Favourite
Our numbers
These spinners will give you the tens and unit digits of a number. Can you choose sets of numbers to collect so that you spin six numbers belonging to your sets in as few spins as possible?
problem
Favourite
Make 37
Four bags contain a large number of 1s, 3s, 5s and 7s. Can you pick any ten numbers from the bags so that their total is 37?
problem
Favourite
Light the lights
Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?