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 a sum invested gains $10\%$ each year how long will it be before it has doubled its value?
If an object depreciates in value by $10\%$ each year how long will it take until only half of the original value remains?
Why aren't these two answers the same?
Is there a rate, used for both gain and depreciation, for which those two answers would actually be the same?
If this problem caught your interest and you know some Stage 5 mathematics this Plus article on Carbon Dating could be a good next step for you.