![Lots of Biscuits!](/sites/default/files/styles/medium/public/thumbnails/content-id-6883-icon.png?itok=s0VQb3Ei)
Factors and multiples
![Lots of Biscuits!](/sites/default/files/styles/medium/public/thumbnails/content-id-6883-icon.png?itok=s0VQb3Ei)
![Times Tables Shifts](/sites/default/files/styles/medium/public/thumbnails/content-id-6863-icon.jpg?itok=2WjKpBW7)
problem
Times Tables Shifts
In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?
![Drawing Celtic Knots](/sites/default/files/styles/medium/public/thumbnails/content-id-6809-icon.gif?itok=Ww25gaqM)
problem
Drawing Celtic Knots
Here is a chance to create some Celtic knots and explore the mathematics behind them.
![Three Dice](/sites/default/files/styles/medium/public/thumbnails/content-id-6719-icon.png?itok=cahapRQD)
problem
Three Dice
Investigate the sum of the numbers on the top and bottom faces of a line of three dice. What do you notice?
![Shifting Times Tables](/sites/default/files/styles/medium/public/thumbnails/content-id-6713-icon.png?itok=y_Wtw3Cv)
problem
Shifting Times Tables
Can you find a way to identify times tables after they have been shifted up or down?
![How much can we spend?](/sites/default/files/styles/medium/public/thumbnails/content-id-6650-icon.png?itok=VYEcWe-l)
problem
How much can we spend?
A country has decided to have just two different coins, 3z and 5z
coins. Which totals can be made? Is there a largest total that
cannot be made? How do you know?
![Multiples Sudoku](/sites/default/files/styles/medium/public/thumbnails/content-id-6434-icon.jpg?itok=vjNndu-o)
problem
Multiples Sudoku
Each clue in this Sudoku is the product of the two numbers in adjacent cells.
![Power mad!](/sites/default/files/styles/medium/public/thumbnails/content-id-6401-icon.png?itok=Ukk2Xjef)
problem
Power mad!
Powers of numbers behave in surprising ways. Take a look at some of these and try to explain why they are true.
![LCM Sudoku II](/sites/default/files/styles/medium/public/thumbnails/content-id-6311-icon.jpg?itok=kOvNXgoH)
problem
LCM Sudoku II
You are given the Lowest Common Multiples of sets of digits. Find
the digits and then solve the Sudoku.
![Venn diagrams](/sites/default/files/styles/medium/public/thumbnails/content-id-6290-icon.png?itok=-ZZdFze4)