Wednesday, 13 February 2013
In the multiplication square below, the boxes at the end of each row and the foot of each column give the result of multiplying the two numbers in that row or column.
Can you work out the arrangement of the digits in the square so that the given products are correct?
Posted by Sam WR at 02:39
The ancient Egyptians were said to make right-angled triangles using a rope which was knotted to make equal sections.
If you have a rope knotted like this, what other triangles can you make? (You must have a knot at each corner.)What regular shapes can you make - that is, shapes with equal sides and equal angles?
Posted by Sam WR at 02:34