!!i can read your mind!! first choose a number/ money in your head, then your dad gave you the same number of money, and i gave you $200 throw half of the money that you, your dad and i gave you in the sea. then bring your dads money back. $100 left? yes

Comments

• I'm pretty sure this is what the question means:
  [(78+78+200)/2] - 78 = 100
  .
  Essentially,
  [(2x+200)/2] - x = (x+100) - x = 100
  So it doesn't matter what number you choose.

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  by bobbinhood on October 12th, 2009

• I thought it was 78+78+200/2 + 78 (dad's money brought back).

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  by Jadey - Vive la difference on October 12th, 2009

• Since you can't very well fish the money out of the sea, I was figuring you brought his money back to him.

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  by bobbinhood on October 12th, 2009

• trick is: any number + dads money the same as yours and my money i gave to you (e.g $200) throw half of total,money bring dads money back and the remainning has to be $100 thats how you can trick your friends
  
  warning: you can only use even numbers or numbers the can be halfed e.g 2, 4, 6, 8, 10.....

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  by mosmith on October 13th, 2009

• Ahh! =)

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  by Jadey - Vive la difference on October 13th, 2009

• SO it was just bad luck that I picked 25, lol.

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  by ninja man on October 14th, 2009