Investigate what happens when you add house numbers along a street
in different ways.
Can you complete this jigsaw of the multiplication square?
Can you see how these factor-multiple chains work? Find the chain which contains the smallest possible numbers. How about the largest possible numbers?
What do the numbers shaded in blue on this hundred square have in common? What do you notice about the pink numbers? How about the shaded numbers in the other squares?
Take a look at the multiplication square. The first eleven triangle
numbers have been identified. Can you see a pattern? Does the
Can you describe this route to infinity? Where will the arrows take you next?
Delight your friends with this cunning trick! Can you explain how
Jamie and Nik described these transformations very clearly. However
the triangular challenges are still to be cracked!
Go to last month's problems to see more solutions.
This article for the young and old talks about the origins of our number system and the important role zero has to play in it.
This Sudoku puzzle can be solved with the help of small clue-numbers on the border lines between pairs of neighbouring squares of the grid.