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Light the Lights
Age 5 to 7
Challenge Level 
Here is a machine with four coloured lights. Each light responds to a rule.
When you type in a number, lights go on if their rule is satisfied.
If the number satisfies more than one rule, then more than one colour will light up.
Type in some numbers and see which lights you can switch on.
Do you get any surprises?
What are the four rules?
What is the smallest number which lights them all up?
When you type in a number, lights go on if their rule is satisfied.
If the number satisfies more than one rule, then more than one colour will light up.
Type in some numbers and see which lights you can switch on.
Do you get any surprises?
What are the four rules?
What is the smallest number which lights them all up?
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