exam Maths Puzzle Numerical Ability

Sue paints a room at the rate of 1/10 room per hour, and Kelly paints the same room at the rate of 1/8 room per hour. How long will it take them to paint the room together?

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exam Other Question

3x-4 for x=-3 Marcella wins third prize and receives check for $250,000. After spending $10,000 on a vacation, she decides to invest the rest in a money market account that pays 1.5% interest compounded monthly. How much maney will be in the accoung after 10 years?