Mrs' Reynolds Brain Busters

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Mrs. Reynolds Brain Busters

• Last Chance for Extra Credit!
• 7th grade only!

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Brain Buster 1 May 7

• Two rectangular boxes have the same volume. One
  of the boxes is a cube, and the other box has
  measurements of 8 ft x 4 ft x 16 ft. How long is
  the edge of the cube?
• MathCounts School Handbook, 2006-2007

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Brain Buster 2 May, 2008

• Ray will choose at random an integer Q such that
  34 lt Q lt 43. What is the probability that Ray
  will choose a prime number? Express your answer
  as a common fraction.
• MathCounts School Handbook 2006-2007

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Brain Buster 3

• An octagon only has sides of length 1 unit and x
  units. In a similar octagon, the corresponding
  sides have length x units and 9 units,
  respectively. What is the value of x?
• MathCounts School Handbook, 2006-2007.

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Brain Buster 4

• What is the value of 2x 3x 4x 5x 6x when
  x 13.1?
• MathCounts School Handbook 2006-2007.