Explore the hyperbolic functions sinh and cosh using what you know about the exponential function.
Can you prove that a quadrilateral drawn inside a tetrahedron is a parallelogram?
If you know some points on a line, can you work out other points in between?
If I don't have the size of cake tin specified in my recipe, will the size I do have be OK?
Would you rather: Have 10% of $5 or 75% of 80¢? Be given 60% of 2 pizzas or 26% of 5 pizzas?
Can you crack my code and use it to find out what two car number plates add up to?
