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problem
How many times?
On a digital 24 hour clock, at certain times, all the digits are consecutive. How many times like this are there between midnight and 7 a.m.?
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problem
Brush loads
How can you arrange the 5 cubes so that you need the smallest number of Brush Loads of paint to cover them? Try with other numbers of cubes as well.
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problem
Torn shapes
These rectangles have been torn. How many squares did each one have inside it before it was ripped?
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problem
Two clocks
These clocks have only one hand, but can you work out what time they are showing from the information?