Fractions

It would be nice to have a strategy for disentangling any tangled ropes...

Take a look at the video and try to find a sequence of moves that will untangle the ropes.

The information display on a train shows letters by illuminating dots in a rectangular array. What fraction of the dots in this array is illuminated?

What is the mean of 1.2 recurring and 2.1 recurring?

What is 50% of 2007 plus 2007% of 50?

Imagine you were given the chance to win some money... and imagine you had nothing to lose...

A Sudoku with clues as ratios or fractions.

Ahmed is making rods using different numbers of cubes. Which rod is twice the length of his first rod?

Find out why these matrices are magic. Can you work out how they were made? Can you make your own Magic Matrix?

The scale on a piano does something clever : the ratio (interval) between any adjacent points on the scale is equal. If you play any note, twelve points higher will be exactly an octave on.