You may also like

problem icon

Two Numbers Under the Microscope

This investigates one particular property of number by looking closely at an example of adding two odd numbers together.

problem icon

Odd Times Even

This problem looks at how one example of your choice can show something about the general structure of multiplication.

problem icon

Walking Round a Triangle

This ladybird is taking a walk round a triangle. Can you see how much he has turned when he gets back to where he started?

A Bag of Marbles

Stage: 1 Challenge Level: Challenge Level:2 Challenge Level:2

bagofMarbles

Suppose that in a bag of marbles, all the ones that -

are rough to feel, have a blue colour on them;

sparkle when rolling, have a red colour on them;

are cold to touch, have a white colour on them;

are dark inside, have a green colour on them.


What can you say about each of the marbles A - J?

10 marbles

Imagine you are making marbles. What colours must be put on marbles that -


sparkle when rolling but are dark inside?

are cold to touch and feel rough?

are cold, but sparkle when rolling?


What colour(s) could be on a marble that -

is cold?

sparkles when rolling?


What colours would you find on a cold, sparkly, dark and rough marble?