Question 18
A ferry can carry ten cars or six trucks across the river on each trip. On Wednesday it crosses five times and transports 42 vehicles in total. How many cars does it transport?
Editorial task: find the intended result under full, single-type loads, then determine whether the original wording forces it. Give a counterexample if it does not.

Original source options (retained):
(A) 10; (B) 12; (C) 20; (D) 22; (E) 30
Editorial format note: this essay examines the source wording and its assumptions. The original choices are retained for comparison.
Editorial task: find the intended result under full, single-type loads, then determine whether the original wording forces it. Give a counterexample if it does not.

Original source options (retained):
(A) 10; (B) 12; (C) 20; (D) 22; (E) 30
Editorial format note: this essay examines the source wording and its assumptions. The original choices are retained for comparison.