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'Thank Your Lucky Stars' printed from https://nrich.maths.org/
Start with the simple problem,
where you need to flip the coin twice:
Which moves are possible?
Which moves lead you to the target?
List the possibilities.
Move to the harder problem
whereyou need to flip the coin four times:
Which moves are possible?
Which moves lead you to the target?
List the possibilities.
Move to the hardest
problem...