6.Robin and Susan are playing a game with nine cards. The cards are numbered from 1 to 9 as shown below.
Robin and Susan take turns to pick up one card each. They keep all the cards that they have picked up so far. The winner is the first player who can make a total of 15 out of the cards in their hand.
Susan starts the first game. She picks the 6 first, and Robin then picks the 3. Next Susan picks the 4, and Robin picks the 5. For her third card, Susan picks the 7, and then Robin picks the 9. Finally, Susan picks the 2.
Susan now has the cards
in her hand.
Susan wins because she can use three of her cards to make a total of 15:
Robin starts the second game. After two turns each, Robin is holding the cards numbered 6 and 4, and Susan is holding the cards numbered 2 and 5. It is Robin’s turn to pick up a card.
Robin decides to pick up the card numbered 8.
Why do you think this is a good move?
Picking up the card numbered 8 is a good move because
Who will win this game? Explain your answer carefully.
—————will win this game because