/sci/ - Science & Math

>>9410897


>As seen in the pic, four cards are sitting on a table. Each card has a letter on one side and a number on the other. Two cards are letter-side up, and two of the cards are number-side up. The rule to be tested is this: for these four cards, if a card has a vowel on its letter side, it has an even number on its number side. Your task is to decide which card or cards must be turned over to find out whether the rule is true or false. Indicate which cards must be turned over.

Source: https://www.scientificamerican.com/article/rational-and-irrational-thought-the-thinking-that-iq-tests-miss/