A crew leader is told that a shipment of 247 items can be split into equal groups with none left over. Which of the following could be the group size?

Correct answer to question 240 (Arithmetic Reasoning): 13

Method

Test each option by dividing into 247. Since 247 divided by 13 equals 19 exactly with no remainder, 13 is a valid group size; the other choices all leave a remainder.