AFCT Arithmetic Reasoning Practice Test 2026 – Comprehensive Exam Prep

To determine how many days are in 3 weeks, it's helpful to know the number of days in a single week. One week consists of 7 days. Therefore, to find the total number of days in 3 weeks, you multiply the number of weeks by the number of days per week:

3 weeks × 7 days/week = 21 days.

This calculation confirms that there are 21 days in 3 weeks, making the first choice the correct answer. The other choices do not accurately reflect the multiplication of weeks by days, resulting in incorrect totals.