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Puzzle 57
Can you make this equation correct by moving exactly one matchstick?
Note: this puzzle is not interactive, and the matchsticks cannot be moved. The matchstick layouts for each digit are:
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Puzzle 58
How many squares of any size on this chessboard do not contain a rook?
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Puzzle 59
A very long time ago, at the beginning of the week, I was given some money for my birthday.
On Monday, I spent a quarter of the money on clothes.
On Tuesday, I spent one third of the remaining money on music.
On Wednesday, I spent half of the remaining money on food.
Finally, on Thursday, I spent the last £12.50 on a book.
How much birthday money did I receive?
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Puzzle 60
What comes next in this sequence:
31 · 41 · 51 · 61 · 71 · 81 · 92 · ?