Listed below are problems from Elementary Brain Teaser where 50% or less of the responses were correct. Test your knowledge by submitting answers to these past problems. Remember, you can still submit answers to any past problem. We will respond to your submission but your name will not be added to the list if your answer is correct.



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• 	9%	Next Problem	August 20, 2012
  	15%	Two By Four	March 03, 2008
  	17%	Leap Frog	January 24, 2011
  	18%	Mean and Median	January 26, 2009
  	19%	One Of These Things	April 02, 2012
  	21%	The Principal	October 16, 2006
  	22%	W Grid	October 22, 2012
  	22%	Bag of Popcorn	September 21, 2009
  	23%	Many Months	December 04, 2006
  	25%	Pennies for School	February 15, 2010
  	26%	Math Letters	September 25, 2006
  	26%	Max 56789	March 05, 2012
  	27%	Counting Rectangles	September 07, 2009
  	28%	More Than Six Factors	October 15, 2007
  	28%	Clock Cheese	April 21, 2008
  	30%	U. S. Coins	February 16, 2009
  	30%	Tiny Product	October 01, 2007
  	30%	Weaklings	September 22, 2008
  	30%	Checkers	January 15, 2007
  	31%	Timely Sequence	October 28, 2002
  	31%	Timely List	September 15, 2008
  	31%	Ruler	June 09, 2008
  	32%	Pieces of Apple Pie	October 11, 2010
  	32%	Cookies	December 10, 2007
  	32%	Bunny Hop	November 20, 2006
  	32%	Fluffs	March 16, 2009
  	33%	Colored Balls	October 01, 2012
  	33%	Heavy Barrel	January 28, 2008
  	34%	Primer	February 27, 2012
  	34%	Haystacks	July 09, 2007
  	35%	Dozens of Dozens of Donuts	January 14, 2008
  	35%	210	April 07, 2008
  	35%	A Gross Amount of Gummie Bears	November 03, 2008
  	36%	How Many Fractions	September 03, 2007
  	36%	St. Patrick Factors	March 17, 2008
  	37%	Soccer Schedule	September 27, 2010
  	37%	Only Three	January 21, 2008
  	38%	Lumberjack	November 05, 2007
  	38%	Same Sum Twice	November 14, 2011
  	39%	Nearest Hundred	October 27, 2008
  	39%	Big Twin Primes	March 19, 2007
  	39%	For Sure Sum	September 26, 2011
  	39%	Shoe Sale	March 26, 2007
  	40%	Weaklings	November 04, 2002
  	40%	Half the Diagonal	September 19, 2011
  	40%	Bradford Pear Tree	February 18, 2008
  	40%	Three Prime	August 13, 2007
  	40%	Even Product	December 01, 2008
  	41%	As Seconds Go By	April 09, 2007
  	41%	Divisible	March 30, 2009
  	41%	Do Not Blink	October 25, 2010
  	41%	March Madness #4	March 29, 2010
  	41%	Mouse About	September 14, 2009
  	42%	Dimes And Quarters	October 02, 2006
  	42%	Matching Socks	November 13, 2006
  	42%	February Not September	September 12, 2011
  	42%	7 or 11	December 03, 2012
  	42%	Class Time	March 09, 2009
  	42%	How Does Your Garden Grow?	October 18, 2010
  	43%	Donut Delight	April 22, 2013
  	43%	Chipmunks	November 29, 2010
  	44%	Leap Year	June 29, 2009
  	44%	Two Digit Multiplies of 7	November 01, 2010
  	45%	Pepperoni Pizza	April 12, 2010
  	46%	Whats Next	February 19, 2007
  	46%	Halloween Bubble Gum	November 06, 2006
  	46%	Turn the Page	January 12, 2009
  	46%	Short Candy	October 31, 2011
  	47%	That Is Odd	April 15, 2013
  	47%	How Many Different Elements	October 20, 2008
  	47%	Subtract and Divide	August 25, 2008
  	47%	Tens Place	December 08, 2008
  	47%	Lots of Sevens	November 05, 2012
  	48%	Blink Blink	October 08, 2012
  	49%	150000	February 06, 2012

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