Euler found four whole numbers such that the sum of any two of the numbers is a perfect square...
The diagram illustrates the formula: 1 + 3 + 5 + ... + (2n - 1) = n² Use the diagram to show that any odd number is the difference of two squares.
How much peel does an apple have?
If the can's diameter is 6 cm what is the can's height?
If the can's height was 10 cm what would the can's diameter have to be?
Which of these two cans uses the least aluminium?
If you could choose any diameter, which dimensions for a 330ml can would use the least amount of aluminium?