Factors and multiples
problem
Star Product Sudoku
Age
11 to 16
Challenge level
The puzzle can be solved by finding the values of the unknown digits (all indicated by asterisks) in the squares of the $9\times9$ grid.
problem
tiling
Age
7 to 11
Challenge level
An investigation that gives you the opportunity to make and justify predictions.
problem
LCM Sudoku
Age
14 to 16
Challenge level
Here is a Sudoku with a difference! Use information about lowest common multiples to help you solve it.
problem
Sorting Numbers
Age
5 to 7
Challenge level
Can you sort numbers into sets? Can you give each set a name?
problem
Three Spinners
Age
7 to 11
Challenge level
These red, yellow and blue spinners were each spun 45 times in
total. Can you work out which numbers are on each spinner?
problem
One of Thirty-Six
Age
5 to 7
Challenge level
Can you find the chosen number from the grid using the clues?
problem
What Do you Need?
Age
7 to 11
Challenge level
Four of these clues are needed to find the chosen number on this grid and four are true but do nothing to help in finding the number. Can you sort out the clues and find the number?
problem
A First Product Sudoku
Age
7 to 14
Challenge level
Given the products of adjacent cells, can you complete this Sudoku?
problem
flow chart
Age
11 to 14
Challenge level
The flow chart requires two numbers, M and N. Select several values
for M and try to establish what the flow chart does.