problem
Favourite
Number detective
Age
5 to 11
Challenge level
Follow the clues to find the mystery number.
problem
Favourite
Coded hundred square
Age
7 to 11
Challenge level
This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?
problem
Favourite
Mystery matrix
Age
7 to 11
Challenge level
Can you fill in this table square? The numbers 2 -12 were used to generate it with just one number used twice.
problem
Favourite
Curious number
Age
7 to 11
Challenge level
Can you order the digits from 1-3 to make a number which is divisible by 3 so when the last digit is removed it becomes a 2-figure number divisible by 2, and so on?
problem
Favourite
Satisfying four statements
Age
7 to 11
Challenge level
Can you find any two-digit numbers that satisfy all of these statements?
problem
Favourite
Follow the numbers
Age
7 to 11
Challenge level
What happens when you add the digits of a number then multiply the result by 2 and you keep doing this? You could try for different numbers and different rules.
problem
What is ziffle?
Age
7 to 11
Challenge level
Can you work out what a ziffle is on the planet Zargon?