exam Maths Puzzle Numerical Ability

Jack invests $1000 at a certain annual interest rate, and he invests another $2000 at an annual rate that is one half percent higher. If he receives a toal of $190 interest in one

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exam Other Question

you want 100 gal. 14% solution. How much 8% solution must be mixed with how much 16% solution to get 100 gals of 14% One pipe can fill a tank in 24 minutes. A second pipe can fill it in 8 minutes and a third pipe can fill it in 12 minutes. If the tank is empty, how long will the three pipes operating together take to fill it?

____minutes

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