Find the product of the numbers on the routes from A to B. Which route has the smallest product? Which the largest?
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?
A mathematician goes into a supermarket and buys four items. Using a calculator she multiplies the cost instead of adding them. How can her answer be the same as the total at the till?
On my calculator I divided one whole number by another whole number and got the answer 3.125. If the numbers are both under 50, what are they?
Is it cheaper to cook a meal from scratch or to buy a ready meal? What difference does the number of people you're cooking for make?
What does the empirical formula of this mixture of iron oxides tell you about its consituents?
Find out why these matrices are magic. Can you work out how they were made? Can you make your own Magic Matrix?
Use the clocks to investigate French decimal time in this problem. Can you see how this time system worked?