India, May 24 -- A US dad took to Reddit after getting stumped by his fifth grader's math homework, and it wasn't just him. The question, involving bottles and basic arithmetic, left many scratching their heads.

"This particular question was in my son's math homework from the other day. They reviewed the answers in class today and apparently the answer was A," the dad wrote on Reddit.

He continued that he was curious to know how that was the solution to the problem and added that his son got an answer that was not listed in the worksheet. "I must be missing something in how it's worded but I can't for the life of me figure it out," he said.

"Kayla has 18 bottles of bubbles. She wants to give 2 bottles to each of her 6 friends. How many...