exam Maths Puzzle Numerical Ability

How many ounces of pure gold must be added to five ounces of something that is 1 percent gold in order that the mixture is 6 percent gold?

Read Solution (Total 0)

exam Other Question

Sam found a number of nickels, dimes, and quarters in his room. He found three more dimes than nickels but twice as many quarters as dimes. The total value of the coins was $5.05. How many coins of each type did Sam find? I do not know what this is asking me. Please help.
Rewrite the middle term as the sum of two terms and then factor completely.

4z^3 - 18z^2 -10z