Can you crack these cryptarithms?
Just because a problem is impossible doesn't mean it's difficult...
By selecting digits for an addition grid, what targets can you make?
What happens when you add a three digit number to its reverse?
Can you find ways to put numbers in the overlaps so the rings have equal totals?
How many different lengths is it possible to measure with a set of three rods?
A cinema has 100 seats. Is it possible to fill every seat and take exactly £100?
Can you devise the most efficient strategy for finding the highest floor from which you can drop an egg safely?
In how many ways can I get upstairs?