To make porridge, Goldilocks mixes oats and wheat bran..... what percentage of the mix is wheat?
Equal circles can be arranged so that each circle touches four or six others. What percentage of the plane is covered by circles in each packing pattern? ...
Prove that the shaded area of the semicircle is equal to the area of the inner circle.
How much more antifreeze is needed to make the proportion 30%?
If the base of a rectangle is increased by 10% and the area is unchanged, by what percentage is the width decreased by ?
Last year, on the television programme Antiques Roadshow... work out the approximate profit.
In this article, Alf outlines six activities using the Gattegno chart, which help to develop understanding of place value, multiplication and division.
