You are walking along the street and are accosted by someone sitting at a table with three playing cards on it face down. You are given a piece of paper with the following four facts on it.
There is a heart to the left of the spade. The six is on the left of the diamond. There is a diamond on the left of the spade. And the eight is to the right of the seven.
You are then offered a bet - correctly identify the three cards and win £1, get it wrong and lose £1
Could work out the positions of the three cards and win the bet?
As you know there is both a heart and a diamond to the left of the spade, the spade must be on the right.
The six is to the left of the diamond, so the diamond is in the middle and the leftmost card is the six.
This means the heart is on the left.
As the eight is to the right of the seven, the seven is in the middle and the eight is the right-hand card.
Left to right the cards are six of hearts, seven of diamonds and eight of spades.
Did you win £1?