3 out of 3
Delight your friends with this cunning trick! Can you explain how it works?
3 out of 3
Weekly Problem 41 - 2009
At a cinema a child's ticket costs £4.20 and an adult's ticket costs £7.70. How much did it cost this group of adults and children to see a film?
3 out of 3
What is the largest number of digits that could be erased from this 1000-digit number, to get a surprising result?
1 out of 3
Draw a 'doodle' - a closed intersecting curve drawn without taking pencil from paper. What can you prove about the intersections?
3 out of 3
Follow-up to the February Game Rules of FEMTO.
2 out of 3
Some relationships are transitive, such as 'if A>B and B>C then it follows that A>C', but some are not. In a voting system, if A beats B and B beats C should we expect A to beat C?
1 out of 3
The interval 0 - 1 is marked into halves, quarters, eighths ... etc. Vertical lines are drawn at these points, heights depending on positions. What happens as this process goes on indefinitely?
