Brainteasers
Four Cards
Reasoning
You are shown a set of four cards on a table, each of which has a
number on one side and a coloured patch on the other side. The
cards show: 3, 8, red and brown. Which card(s) must you turn over
to test the proposition that if the card has an even number, then the
opposite side is red?
number on one side and a coloured patch on the other side. The
cards show: 3, 8, red and brown. Which card(s) must you turn over
to test the proposition that if the card has an even number, then the
opposite side is red?