Skip over navigation
A problem in which students can apply their understanding of how prime numbers form the building blocks of numbers.
Students will need to develop strategies that help them narrow down their options and then work systematically.
You can find a similar problem on the NRICH site: Funny Factorisation
One to Eight
Age 11 to 14
Challenge Level 
A problem in which students can apply their understanding of how prime numbers form the building blocks of numbers.
Students will need to develop strategies that help them narrow down their options and then work systematically.
You can find a similar problem on the NRICH site: Funny Factorisation
You may also like
Pair Sums
Five numbers added together in pairs produce: 0, 2, 4, 4, 6, 8, 9, 11, 13, 15 What are the five numbers?
Hallway Borders
What are the possible dimensions of a rectangular hallway if the number of tiles around the perimeter is exactly half the total number of tiles?