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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.

Estimate what weight of liquid you drink in a year. A cup of tea or coffee is about half a pound, a pint weighs about a pound and a quarter, and a litre of wine or soft drink is about 2 pounds in weight.

Answer: 4 pound per day is over 1400 pound in a year so more than 100 ston