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As Old As The Trees

Category:	Math
Submitted By:	TRILLIONAIRE
Fun:	(2.26)
Difficulty:	(2.14)

During its first year a species of tree reaches a height of 7cm. It continues to grow for another 9 years attaining its maximum height at 10 years of age. Each year it continues to grow at the rate of double the previous year's height. At what age will the tree be half its maximum height?

Note: The tree grows at a constant speed throughout the year.

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Comments on this teaser


Posted by agal1977	04/04/08
:D A wonderful Math teaser. It made me think and I really enjoyed it.

Posted by ebraham	04/06/08
A good math brain teaser! Thanks For A Great Teaser TRILLIONARE!

Posted by sweetmama	04/07/08
My head officially hurts, lol jk! Nice teaser!

Posted by SSVillalobos	04/14/08
I liked this one, but was off by 1/4 year. Hrmph. :)