Suppose you are given the following problem: "There are four cards showing E, J, 2, & 5. On one side of each card is a letter, and on the other side is a number. Consider this rule: "If a card has a vowel on one side, then it has an odd number on the other side." Select the card or cards that you definitely must turn over to determine whether the rule is true or false for the four cards indicated.

Question

Quizplus · Accepted Answer

To test the rule, you must check if cards with vowels have odd numbers on the other side and ensure cards with even numbers do not have a vowel on the opposite side. Therefore, you need to turn over the E card (to see if there's an odd number) and the 2 card (to ensure there's no vowel on the other side).

Suppose You Are Given the Following Problem: "There Are Four