Factors and multiples

problem
The moons of Vuvv

Age

7 to 11

Challenge level

The planet of Vuvv has seven moons. Can you work out how long it is between each super-eclipse?
problem
Spelling circle

Age

7 to 11

Challenge level

Find the words hidden inside each of the circles by counting around a certain number of spaces to find each letter in turn.
problem
Red balloons, blue balloons

Age

7 to 11

Challenge level

Katie and Will have some balloons. Will's balloon burst at exactly the same size as Katie's at the beginning of a puff. How many puffs had Will done before his balloon burst?
problem
Tom's number

Age

7 to 11

Challenge level

Work out Tom's number from the answers he gives his friend. He will only answer 'yes' or 'no'.
problem
Flashing lights

Age

7 to 11

Challenge level

Norrie sees two lights flash at the same time, then one of them flashes every 4th second, and the other flashes every 5th second. How many times do they flash together during a whole minute?
problem
Abundant numbers

Age

7 to 11

Challenge level

48 is called an abundant number because it is less than the sum of its factors (without itself). Can you find some more abundant numbers?
problem
Zios and Zepts

Age

7 to 11

Challenge level

On the planet Vuv there are two sorts of creatures. The Zios have 3 legs and the Zepts have 7 legs. The great planetary explorer Nico counted 52 legs. How many Zios and how many Zepts were there?
problem
Mathematical swimmer

Age

11 to 14

Challenge level

Can you work out how many lengths I swim each day?
problem
What is ziffle?

Age

7 to 11

Challenge level

Can you work out what a ziffle is on the planet Zargon?
problem
What two ...?

Age

7 to 11

Challenge level

56 406 is the product of two consecutive numbers. What are these two numbers?