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    wit's Avatar
    wit Posts: 1, Reputation: 1
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    #1

    Jul 12, 2012, 05:52 AM
    math word problem that doesn't add up
    I barrow $500 from mom and $500 from dad. I spend $970. I pay dad $10. And I pay mom $10. I have $10. Left. Only problem I have is in the math. $500. Less $10. Is $490. X 2 = $980 + $ 10. I had left over is $ 990. Why is the math not adding up?
    get8p's Avatar
    get8p Posts: 59, Reputation: 4
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    #2

    Jul 12, 2012, 07:00 AM
    Seriously, WHAT?
    You're asking why do you have $10 left?
    samnasdaq's Avatar
    samnasdaq Posts: 4, Reputation: 1
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    #3

    Jul 12, 2012, 07:59 AM
    $500 from mom + $500 from dad = $1000
    You spent $970.
    $1000 - $970 = $30
    You paid your mom $10 and your dad $10, which is a total of $20. ($10 +$10 = $20)
    So now you lossed $20 from your remaining $30. ($30 - $20 = $10)
    You should only have $10 left.
    JudyKayTee's Avatar
    JudyKayTee Posts: 46,503, Reputation: 4600
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    #4

    Jul 14, 2012, 05:45 AM
    Quote Originally Posted by wit View Post
    I barrow $500 from mom and $500 from dad. I spend $970. I pay dad $10. and I pay mom $10. I have $10. left. Only problem I have is in the math. $500. less $10. is $490. x 2 = $980 + $ 10. I had left over is $ 990. Why is the math not adding up??

    Your answer is $990 BECAUSE you forgot about the second $10 (to your Mom) and the fact that you spent $970.

    Take your $990, subtract $10 = $980, subtract $970 = $10.

    Your formula, for lack of a better word, is faulty.
    J_9's Avatar
    J_9 Posts: 40,298, Reputation: 5646
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    #5

    Jul 14, 2012, 06:18 AM
    I think you forgot that you SPENT $970?
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