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When Lenny was five years old, he hammered a nail into a tree near his house to mark his height. Fifteen years later at age 20, Lenny returned to see how much higher the nail was. If the tree grew by 5 inches each month, how much higher would the nail be?

I have provided a hint if you need one:

Remember that trees "________", and you will know the answer.

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2 Answers 2

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The nail will be

zero

inches higher. Because...

Trees grow from the top.

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    $\begingroup$ Chances are he won't even find the nail because the tree grew around it in width. $\endgroup$ Dec 1, 2014 at 7:40
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    $\begingroup$ With a hard-drive magnet he will have a mysterious way of hanging something on the tree! $\endgroup$
    – dotancohen
    Dec 1, 2014 at 11:20
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    $\begingroup$ @dotancohen Oh snap, brb putting a strong magnet onto a tree to blow my kids' minds in a few years. $\endgroup$ Dec 1, 2014 at 13:19
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    $\begingroup$ tjbtech I'm upset with you! I was about to answer with this last night after I edited the question and my iPod ran out of battery D: $\endgroup$
    – warspyking
    Dec 1, 2014 at 18:43
  • $\begingroup$ You have my most sincere sympathies. I mean, here you are selflessly improving the content for others, and you get screwed. Well, no good deed... But I didn't realize people still used iPods. I figured, with smart phones and all, all they're good for is nailing to a tree. You oughta see my mesquite. It's like a Christmas tree of Nano's spanning six generations. (Hence, my knowledge of the answer going in.) $\endgroup$
    – tjbtech
    Dec 1, 2014 at 19:38
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Nail won't be there as trees do grow they they also expand ,so then the trunk will expand the nail won't be there as they expand inside out.

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    $\begingroup$ This question was already answered over a year ago. $\endgroup$
    – Deusovi
    Mar 17, 2016 at 13:39
  • $\begingroup$ Won't the nail technically still be there, just covered up? $\endgroup$
    – dpwilson
    Mar 17, 2016 at 13:49

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