Braingle: 'High Tide' Brain Teaser

High Tide

Trick brain teasers appear difficult at first, but they have a trick that makes them really easy.

Puzzle ID:	#688
Fun:	(2.62)
Difficulty:	(1.02)
Category:	Trick
Submitted By:	flipakosayo
Corrected By:	shenqiang

A boat has a ladder hanging off the side that has six rungs. Each rung is one foot apart. The bottom rung is one foot from the water. The tide rises at 12 inches every 15 minutes. High tide peaks in one hour. When the tide is at its highest, how many rungs are under water?

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Comments

jboo4u Aug 31, 2004
boodler Oct 27, 2005	It's "its", not "it's"
solarsistim321 Feb 06, 2006	I was gonna do that one!
mbhpatrick Jun 27, 2006	classic one... but i guess a nice classic one
OldChinaHand Oct 11, 2006	This is older than Noah's boat ride.
baby_girls23 Jan 22, 2007	this teaser is played out!
mercedes13 Apr 20, 2007	actually it's "its." you don't say "when the tide is at it is highest," do you? good teaser, although it is a little bit old. one of my friends told me it, so i knew the answer.
7mi27 Nov 02, 2008	This was actually the first time I had heard it. Good teaser! I liked it!
coolkcoolk Oct 27, 2009	nice!
babyjuice Jun 04, 2012	I thought the ladder just floated on the top of the water.