1 out of 3
Each child in Class 3 took four numbers out of the bag. Who had made the highest even number?
1 out of 3
Dicey Operations for an adult and child. Can you get close to 1000 than your partner?
2 out of 3
This is a game for two players. What must you subtract to remove the rolled digit from your number? The first to zero wins!
2 out of 3
What do the digits in the number fifteen add up to? How many other numbers have digits with the same total but no zeros?
2 out of 3
Investigate the different ways these aliens count in this challenge. You could start by thinking about how each of them would write our number 7.
2 out of 3
The Scot, John Napier, invented these strips about 400 years ago to help calculate multiplication and division. Can you work out how to use Napier's bones to find the answer to these multiplications?
3 out of 3
In the multiplication calculation, some of the digits have been replaced by letters and others by asterisks. Can you reconstruct the original multiplication?
3 out of 3
3 out of 3
Start by putting one million (1 000 000) into the display of your calculator. Can you reduce this to 7 using just the 7 key and add, subtract, multiply, divide and equals as many times as you like?
3 out of 3
A school song book contains 700 songs. The numbers of the songs are displayed by combining special small single-digit cards. What is the minimum number of small cards that is needed?
