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Mind Twister

3 guys go for dinner, each buys a $10 steak.

At the end of the meal, they collect $30 between the three of them to cover the cost of the meals and gives it to the waitress. She goes back to the cash register, where the overlooking manager says “Those dinners are discounted, you need to give them $5 back.” So the waitress gets the five dollars, and returns to the table. Not knowing how to split $5 between the three of them, she gives 1 dollar to each of the three patrons, and kept two for herself.

Now if you do the math, together they paid $30, got $3 back meaning they only paid $27. The waitress kept $2. This totals $29. Where did the last dollar go?

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Two other Opinions:

  1. Kate
    07:31 on Monday, January 17th, 2005
    30 dollars - 5 dollars from the waitress for the discount = $25. She gives back 3 dollars to the guys which then makes that 28 dollars, and then keeps the 2 dollars for herself which makes 30. I don’t know how to explain it, but I see it working. :)
  2. someone
    09:41 on Tuesday, March 8th, 2005
    Faulty arithmetic. The $2 should not be added to the amount paid by the diners because it is part of the $5 discount.

    $30 - $5 = $25

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