First To Fifty

Author: Gabriella Simonetti
2 months ago

Riddle: Zack invented a game for him and his friend Dan to play. They would take turns saying numbers between one and 10. The next player would have to say a number that is greater than the previous one by a number between one and 10. The first player to say 50 would be the winner. Zack decides to let Dan start. How can Dan win?
Answer: If Dan wants to say 50, then he needs Zack to say a number between 40 and 49, so right before 50, Dan needs to say 39. If he wants to say 39, then Zack needs to say a number between 29 and 38, so right before 39, Dan needs to say 28. If Dan wants to say 28, Zack has to say a number between 18 and 27, so right before 28, Dan has to say 17. And if he wants to say 17, he has to let Zack say a number between 7 and 16, so right before 17, Dan has to say 6. In order to win, Dan needs to say 6, then 17, then 28, then 39, and finally 50.
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Source: https://www.riddles.com/11342
COMMENT
Zack invented a game for him and his friend Dan to play. They would take turns saying numbers between one and 10. The next player would have to say a number that is greater than the previous one by a number between one and 10. The first player to say 50 would be the winner. Zack decides to let Dan start. How can Dan win?
First to Fifty by Gabriella Simonetti v1.


Riddle: Zack invented a game for him and his friend Dan to play. They would take turns saying numbers between one and 10. The next player would have to say a number that is greater than the previous one by a number between one and 10. The first player to say 50 would be the winner. Zack decides to let Dan start. How can Dan win? Answer: If Dan wants to say 50, then he needs Zack to say a number between 40 and 49, so right before 50, Dan needs to say 39. If he wants to say 39, then Zack needs to say a number between 29 and 38, so right before 39, Dan needs to say 28. If Dan wants to say 28, Zack has to say a number between 18 and 27, so right before 28, Dan has to say 17. And if he wants to say 17, he has to let Zack say a number between 7 and 16, so right before 17, Dan has to say 6. In order to win, Dan needs to say 6, then 17, then 28, then 39, and finally 50.
by Gabriella Simonetti v2.