book Maths Puzzle Numerical Ability

|5 - x| ≤ 4

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book Other Question

Cheryl has 20 coins worth $3.15. If the coins are dimes and quarters only, how many of each type of coin does she have? A local department store sells carpets in 3 sizes. Each carpet comes in 2 different qualities. One of the sizes comes in 6 colors. The other sizes come in 2 colors. How many choices of carpet are there?