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Puzzle of the Day

These puzzles are also printed in Eight days a week, a booklet published by the Association of Teachers of Mathematics.The Association of Teachers of Mathematics

One home improvement saves 30% on fuel, a second saves 45% and a third 25%. If you use all three can you save 100%. If not why not?

Answer: If you save 30% you pay 70% of original. If you now save 45% of this you pay 55% of 70% of original, if you now save 25% you pay 25% of 55% of 70% of original. This under 30% of original

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