# How high is the nail in the tree?

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.

The nail will be

zero

inches higher. Because...

Trees grow from the top.

• Chances are he won't even find the nail because the tree grew around it in width. Dec 1, 2014 at 7:40
• With a hard-drive magnet he will have a mysterious way of hanging something on the tree! Dec 1, 2014 at 11:20
• @dotancohen Oh snap, brb putting a strong magnet onto a tree to blow my kids' minds in a few years. Dec 1, 2014 at 13:19
• 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: Dec 1, 2014 at 18:43
• 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.) Dec 1, 2014 at 19:38

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.

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