Surd Pairs

Cut out the 40 cards in the pack. Make sure they are shuffled well.
Spread them on a table, face down.
Two or more players in turns take it to turn two cards over at a time. If they make an equivalent pair, they keep the cards and try again. If they don’t, it is then the next player’s turn.
If the player thinks they have a pair, they must fully convince the other players by showing their workings in their book, unless the team does agree without convincing.
Player with the most cards at the end wins.