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?
A millilitre is one cubic centimetre.
Check that you can calculate the volume of a cylinder.
If the diameter is 6 cm, you can calculate the base area of the
If you know the base area you can find a height which will give
you a specific volume ( 330 ml in this case)
Now start with a height (10 cm) and work your way back to a base
area for a specified volume, then find a radius for that base area,
and hence a diameter for the can.
What does least aluminium require ?
The top and base of the can are circles but how do you calculate
the curved surface area ?