Correct
Explanation
13 : 3 = 4.333333. And since one can't go anywhere 0.333333 times, Mike will need to take 5 trips to the store to get all the water he needs.
Solve this puzzle
The ages of a father and son add up to 66. The father’s age is the son’s age reversed. How old could they be?
31 and 13 61 and 16 21 and 12 51 and 15