Question

How many 4 1/2 gallon cans of gas would you need to pour into an empty 18 gallon tank to fill it exactly halfway ?

Answer 1

The answer: is two cans of gasoline

Answer 2

To fill 18 gallons halfway, you need 9 gallons. Divide 9 gallons by 4 1/2, and get 2 cans.

So the answer is 2 cans of gas.