Elementary Brain Teaser




Pick a Marble

One container has 3 red marbles and 2 blue ones in it. A second container has 2 red marbles and 1 blue one in it. If you have to take a red marble out of one container to win a prize and you are not allowed to look in either container when you pick, which container gives you the best chance of winning the prize, the first one or the second one? Explain how you arrive at your answer.


Correct Solutions:


  1. Kelly Gough. Walkersville ES, Walkersville, MD
  2. Lindsey Daugherty. Mineral Wells ES,, Mineral Wells, WV
  3. Michael Combs. Walnut Creek MS Erie, PA
  4. Alexander Lu. Walnut Creek MS, Erie, PA
  5. Tyranika Bearden. Shell Point, Beaufort, SC
  6. Keaishawn Matthews. Shell Point, Beaufort, SC
  7. Jennifer Lai. Rainbow ES, Winter Springs, FL
  8. Michael Fiorenza. Rainbow ES, Winter Springs, FL
  9. Jeromy Chandler. Sunrise ES, Albany, OR
  10. Elise Hernandez. Rainbow ES, Winter Springs, FL
  11. Adam Thornton. Walnut Creek MS, Erie, PA
  12. Stuart Hinton. Harbins ES, Dacula, GA
  13. Andy Fromknecht. Walnut Creek MS, Erie, PA
  14. Scott Chase. Rainbow ES, Winter Springs, FL
  15. Lindel Thomas. Walnut Creek MS, Erie, PA
  16. Brett St.Onge. Rainbow ES, Winter Springs, FL
  17. Adam Maberry. Buchanan ES, Pierre, SD
  18. Daniel Geary. Lake Highland Prep, Orlando, FL
  19. Caitlin Geary. Lake Highland Prep, Orlando, FL
  20. Bubba Whitney. Little Oak MS, Slidell, LA
  21. Adrain Khoo. Ferris, Richmond, BC, Canada
  22. Aaron DeSelms. Easthill ES, Kent, WA
  23. Nic DeSelms. Easthill ES, Kent, WA
  24. Lindsey Daugherty. Mineral Wells ES, Mineral Wells, WV
  25. Matt Zacour. Walnut Creek MS, Erie, PA
  26. Ben Detter. Walnut Creek MS, Erie, PA
  27. K.C. Smith. Lincoln Akerman ES, Hampton Falls, NH
  28. Max Adelman. Zervas ES, Newton, MA
  29. James Britton. Walnut Creek MS, Erie, PA
  30. Mike Pistone. Walnut Creek MS, Erie, PA
  31. Terri Martin. Lincoln Akerman School, Hamton Falls, NH
  32. Eric Krahe. Walnut Creek MS, Erie, PA
  33. Robby Hunn. Geneva ES, Geneva, FL
  34. Lindsey Daugherty. Mineral Wells School, Mineral Wells, WV
  35. Kirk Ellison. South Conway ES, Conway, SC
  36. Aaron Preston. Harbins ES, Dacula, GA
  37. Jordan Carter. Harbins ES, Dacula, GA
  38. Alex Kin. Rainbow ES, Winter Springs, FL
  39. Trace Aber. Englewood ES, Englewood, OH
  40. Casey Brown. Harbins ES, Dacula, GA
  41. Laura Cepero. Rainbow ES, Winter Springs, FL
  42. Alex McMullen. Norcross ES, Norcross, GA
  43. Jamie Orr. Geneva ES, Geneva, FL
  44. Kevin Nethers. Rainbow ES, Winter Springs, FL
  45. Van Chay. Harbins ES, Dacula, GA
  46. Cody Lewis. Southeast MS, Ravenna, OH
  47. Stephanie Parker. Sacred Heart School, Boise, ID
  48. Leonard Anghelescu. Broadlands PS, North York, Ontario, Canada
  49. Dalma Ruelas. Norcross ES, Norcross, GA
  50. Tara Clayton. Harbins ES, Dacula, GA
  51. Chase Thomas. Englewood Hills ES, Englewood, OH
  52. Lauren Aouate. Rainbow ES, Winter Springs, FL
  53. Meggan Eastham. Geneva ES, Geneva, FL
  54. Aubrey Wingo. Rainbow ES, Winter Springs, FL
  55. Megan Humbert. Englewood Hills ES, Englewood, OH
  56. Danica Mendenhall. Englewood Hills ES, Englewood, OH
  57. Brandon Myers. Englewood Hills ES, Englewood, OH
  58. Jonathan McBryar. Harbins ES, Dacula, GA
  59. Geogre Waters. Rainbow ES, Winter Springs, FL
  60. Vince Raley. Rainbow ES, Winter Springs, FL
  61. Josh Pieper. Rainbow ES, Winter Springs, FL
  62. Caleb Steffes. Harbins ES, Dacula, GA
  63. Jonathan McBryar. Harbins ES, Dacula, GA
  64. Jennifer Stewart. Rainbow ES, Winter Springs, FL
  65. Meagen Hall. Rainbow ES, Winter Springs, FL
  66. Xylene Almanza. Rainbow ES, Winter Springs, FL
  67. Gerald Davis. Norcross ES, Norcross, GA
  68. Tripper Elmer. Rainbow ES, Winter Springs, FL
  69. Kyle Sierschula. Englewood Hills ES, Englewood, OH
  70. Ashley Ward. Rainbow ES, Winter Springs, FL
  71. Jeannie Yu. Lake Highland Prep, Orlando, FL
  72. Tao Tao Chen. Ellis ES, Sunnyvale, CA
  73. Steven Carmain. Northwestern ES, Kokomo, IN
  74. Aliya Merchant. Gateway PS, Toronto, Ontario, Canada
  75. Lindsey Aasness. Sibley ES, Albert Lea, MN
  76. Aaron Bartholmey. Sibley ES, Albert Lea, MN
  77. Mike Behrends. Sibley ES, Albert Lea, MN
  78. Pete Bracker. Sibley ES, Albert Lea, MN
  79. Seth Brua. Sibley ES, Albert Lea, MN
  80. Ethan Berg. Sibley ES, Albert Lea, MN
  81. Sean Fedorko. Walnut Creek MS, Erie, PA
  82. Eric Konczal. Rainbow ES, Winter Springs, FL
  83. Anthony Flowers. Norcross ES, Norcross, GA
  84. Navid Khodadadi. Norcross ES, Norcross, GA
  85. Michael Scribner. Rainbow ES, Winter Springs, FL
  86. Amanda Townsend. Rainbow ES, Winter Springs, FL
  87. Camie Whigham. Harbins ES, Dacula, GA
  88. Jana Wilson. Harbins ES, Dacula, GA
  89. Kelli Lankford. Harbins ES, Dacula, GA
  90. Brian Rosbury. Harbins ES, Dacula, GA
  91. Hannah Gordon. Tracy ES, Easton, PA
  92. Kevin Crass. Decorah ES, West Bend, WI
  93. Poonamjit Bath. Meadows West School, Winnipeg, Manitoba, Canada
  94. Jenni Hilbert. Walnut Creek MS, Erie, PA





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