article
The Chinese remainder theorem
In this article we shall consider how to solve problems such as "Find all integers that leave a remainder of 1 when divided by 2, 3, and 5."
Search
article
Subitising
In this article for EY practitioners, Dr Sue Gifford outlines what we mean by subitising and how we can teach it.
problem
Favourite
Five Coins
5 to 11
Ben has five coins in his pocket. How much money might he have?
problem
Favourite
Expenses
14 to 16
What is the largest number which, when divided into these five numbers in turn, leaves the same remainder each time?
problem
Times
7 to 11
Which times on a digital clock have a line of symmetry? Which look
the same upside-down? You might like to try this investigation and
find out!
problem
Favourite
Quadrilaterals
7 to 11
How many DIFFERENT quadrilaterals can be made by joining the dots on the 8-point circle?
problem
Favourite
Triangles in Circles
11 to 14
Can you find triangles on a 9-point circle? Can you work out their angles?
problem
Favourite
At Right Angles
14 to 16
Can you decide whether two lines are perpendicular or not? Can you do this without drawing them?