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How would you put these journey lengths in order?

You'll need two dice to play this game against a partner. Will Incey Wincey make it to the top of the drain pipe or the bottom of the drain pipe first?

What happens when we square complex numbers? Can the square of a complex number be real?

Does weight confer an advantage to shot putters?

How fast would you have to throw a ball upwards so that it would never land?

Two engines, at opposite ends of a single track railway line, set off towards one another just as a fly, sitting on the front of one of the engines, sets off flying along the railway line...

I need a figure for the fish population in a lake. How does it help to catch and mark 40 fish?

Can you hang weights in the right place to make the the number balance balanced?

If there are 3 squares in the ring, can you place three different numbers in them so that their differences are odd? Try with different numbers of squares around the ring. What do you notice?

The challenge for you is to make a string of six (or more!) graded cubes.