“FUN” PROBLEM #4

1. Find a number which is 10 more than its additive inverse.

2. Find a number which is 14 less than its additive inverse.

3. Seven times a certain number is nine less than twice number. Find the number.

4. Seven times a certain number is fourteen more than five times the number.

5. Frank challenged: “Six years ago I was half as old as I am old. How old am I?”

6. Ada declared, “Twenty years from now I will be three times as old as I am now. How old am I?”

7. Roger had 6 steel balls of the same size and shape. He found that when he put 5 of the balls

in one pan of a beam balance and put the sixth ball and a 100-gram weight in the other pan,

the pans were in balance. How much did each ball weigh?

8. Wilma has six coins of the same kind. A dollar and two of the coins have the same total value

as all six coins put together, what kind of coin does Wilma have?

9. A mother aged 29 has a 5-year old daughter. In how many years will the mother be

four times as old as her daughter?

10. Fifteen old Al has an uncle who is 43 years old. How many years ago was the uncle fives

times as old as Al was?