You Want Exactly Nine Gallons of Water, but You Have

question 171

Multiple Choice

You want exactly nine gallons of water, but you have only a seven-gallon bucket and a five-gallon bucket. Although you, at first, do not see how these two buckets can help, you realize that you can use them in the following way. You fill the seven-gallon bucket, then pour it in the five-gallon bucket, leaving two gallons in the seven-gallon bucket. You then pour out the five-gallon, pour the two gallons of water in the five-gallon, and refill the seven-gallon bucket, and you have a total of nine gallons of water. To solve this problem, you had to use

• A)selective comparison.
• B)selective attention.
• C)selective encoding.
• D)selective combination.