ChiranjeevSingh
Hello Everybody,
I saw the below question in a course on logical thinking. It's an interesting question that tests how precisely ones understands a statement, a critical skill tested heavily in the GMAT CR section. Data says that 70% of the people get the answer wrong.
Statement: If a card has a vowel on one side, then it has an even number on the other side.
Flipping which of the following cards will help you in verifying the correctness of the above statement? (Multiple cards may be helpful)
Attachment:
Picture2.jpg
I'll post the answer in a few hours.
I think flipping the cards '3' and 'A' will help to evaluate the correctness of the statement.
Flipping '8' will not help because it is not mentioned that 'vowel on one side' is the only condition to have an even number on the other side. It is possible that both sides of the card have numbers.
Similarly, flipping 'X' also will not help because it is a possibility that a consonant on one side can also have an even number on the other side.
Flipping card '3' will confirm the statement if on its other side there isn't a vowel. Anything other than a vowel can have a odd number on the other side. So, flipping '3' will help to confirm whether its other side has a vowel.
Flipping 'A' will help to directly check the statement, i.e., it must have an even number on its other side for the validity of the statement.