
problem
Special sums and products
Find some examples of pairs of numbers such that their sum is a
factor of their product. eg. 4 + 12 = 16 and 4 × 12 = 48 and
16 is a factor of 48.
In 15 years' time my age will be the square of my age 15 years ago. Can you work out my age, and when I had other special birthdays?