In front of you are four cards. Each card has a letter or number printed on the face-up side. The cards read, in order:
A
Z
4
9
In the deck that these cards have been dealt from, all of the cards have a number on one side and a letter on the other.
If I told you that there was a rule, that cards which have an "A" on one side always have a "4" on the other, which two cards would you turn over to attempt to disprove the rule?
A
Z
4
9
In the deck that these cards have been dealt from, all of the cards have a number on one side and a letter on the other.
If I told you that there was a rule, that cards which have an "A" on one side always have a "4" on the other, which two cards would you turn over to attempt to disprove the rule?
