exam Maths Puzzle Numerical Ability

A nurse has 1 liter of a solution that is 20% alcohol. How much pure alchol must she add to bring the solution up to a 25% concentration

Read Solution (Total 0)

exam Other Question

Make a mathematical argument that the two acute angles of a right triangle are complementary. Suppose you have 12 coins that total 32 cents. Some of the coins are nickels and the rest are pennies. How many of each coin do you have?