exam Maths Puzzle Numerical Ability

Doll houses and their furnishings are usually built to scale of exactly 1 in. to 1 ft., meaning an item 1 ft.long in a real house is 1 in. long in a doll house.

a) What is the

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exam Other Question

A certain radioactive element decays exponentially with a half-life of 5 hours. Find the time that has elapsed if a 50mg sample has decayed to 17 mg. Write a inequality for: Four more than the quotient of a number and three is at least nine.