The number 2.525252525252.... can be written as a fraction. What is the sum of the denominator and numerator?
What is the last digit of the number 1 / 5^903 ?
Where will the point stop after it has turned through 30 000 degrees? I took out my calculator and typed 30 000 ÷ 360. How did this help?
The Egyptians expressed all fractions as the sum of different unit fractions. The Greedy Algorithm might provide us with an efficient way of doing this.
Find the decimal equivalents of the fractions one ninth, one ninety ninth, one nine hundred and ninety ninth etc. Explain the pattern you get and generalise.
A jigsaw where pieces only go together if the fractions are equivalent.
Match the cards of the same value.