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Puzzle #217: Can Neville escape the deadly, flesh-eating moat monster?

Can you solve this week’s arithmetical puzzle, Vicious circle? Plus the answer to puzzle #216

12 April 2023

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#217 Vicious circle

Set by Brian Hobbs

It made sense at the time. The enemy was coming and Neville the Mighty But Not That Bright had created a circular moat in which he placed a fast-swimming, flesh-eating moat monster. He stood at the centre of the island, sword in hand, guarding the only bridge, and ready to fight whoever dared to cross. The plan was foolproof… until the enemy burned down the bridge.

Now, Neville is stranded on an island encircled by a moat with a monster in it. He can just barely run and jump the moat, but the …

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