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Today Puzzle #650

Puzzle No. 650 – Thursday 9 January

On a Monday, all prices in Isla’s shop are 10% more than normal. On Friday all prices in Isla’s shop are 10% less than normal. James brought a book on Monday for £5.50. What would be the price of another copy of this book on Friday?

Today’s #PuzzleForToday has been set by the Senior Kangaroo mathematics competition, run in the UK by the UK Mathematics Trust.

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James brought a book for £5.50, so the normal price would be £5. On Friday, another copy of this book would therefore cost £4.50.

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