The correct answer to this question is 18. To solve this question, one could subtract 54 from 72. We would subtract this number because the amounts aren't equal and subtracting them would allow us to know how many could share the fruits. This leaves us with answer 18.
This question includes a world problem, which is popular with math tests and SATs. A word problem is an exercise used in math to solve an equation. Usually, hypothetical situations are posed, and words are used instead of the standard numerical issues. Word problems help students correlate math with real word situations that they can relate to.