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Brainy Game Question

Brainy Game Question - 9 June

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?
PS: The sum should be exactly 15.

For Solution : Click Here

13 comments:

  1. play first and choose a small.number

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  2. It doesn't matter ... since you need exactly 15 opponents can just pick the exact number needed as a 'blocker' ... im pretty sure every game would end in a draw

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    Replies
    1. I cant understand a word u r saying :P

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  3. play first and start with 5 u will be winner for example jack say 6 then u can plus 9 so it become 15 and second will not able to get something more than 14

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    1. Did not understand ..
      Say U : 5
      Jack : 6
      U : 9 (otherwise u have to let Jack win)
      Jack : 1 (coz he won't let u win)
      How's is it that U are going to win ?

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    2. No not 9 i say plus 9 hence it become 15

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  4. Suppose you are player 1 and your friend is player 2.
    You pick up 9, then your friend will choose 8.
    Now you won’t be able to pick up 7 as then your sum will be more than 15 which will make you lose. But then your friend will pick 8 and will win.

    Thus you will start by picking 1. If your friend picks up 2, then you will pick 3 and your friend will pick 4. Now this will force you to pick 9. The score now becomes 6 to 13 and you have no chance of winning. Thus you pick up 9 after your friend picks up 2. Then the player 2 will pick 8. The score will now be 10 to 10. Thus you pick the number 3 as picking 7 will throw him over 15. Your friend will pick 4. Now you will have no move, thus your friend will win. So it will be wise to play second.

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  5. sorry Na Nijam, I didn't understand the question at first. However u will be winner if u play as first player and pick up 6 for the first digit so u force Jack to pick 9 then u pick 1 or 2 so ur number will become 7 or 8 if ur number is 7 Jack need to put 8 but he can't hence he already got 9 thus he can pick any number but when he finish u will be winner

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