Can you find any two-digit numbers that satisfy all of these statements?
Can you explain the strategy for winning this game with any target?
Play the divisibility game to create numbers in which the first two digits make a number divisible by 2, the first three digits make a number divisible by 3...
Using your knowledge of the properties of numbers, can you fill all the squares on the board?
The flow chart requires two numbers, M and N. Select several values for M and try to establish what the flow chart does.
Each clue in this Sudoku is the product of the two numbers in adjacent cells.
A country has decided to have just two different coins. Which totals can be made? Is there a largest total that cannot be made? How do you know?
Can you find a way to identify times tables after they have been shifted up or down?
Imagine we have four bags containing a large number of 1s, 4s, 7s and 10s. What numbers can we make?
