510-06CCountdown.pdf

# In a particular such tournament there are 256 players

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In a particular such tournament there are 256 players. How many individual games must be played to determine the champion? 74. What is the simplified value of 55 2 45 2 ? 75. The diagonal lengths of a rhombus are 24 units and 10 units. What is the area of the rhombus, in square units? 76. What is the value of c if the lines with equations y = 8 x + 2 and y = (2 c ) x 4 are parallel? 77. If 2 3 × 4 × 8 = 2 k , what is the value of k ? 78. Ryan’s truck travels 8 miles every 10 minutes. The speed limit on the road is 40 mph. By how many miles per hour is Ryan’s truck exceeding the speed limit? 79. A bookstore sells used books at a 40% discount off the regular price of the book when it was new. The price of a used book is \$18. What was the regular price of that book when it was new? 80. In a bag with 20 marbles, five of them are blue. How many blue marbles must be added to the bag so that the probability of selecting a blue marble at random is 1 2 ? 68. ________________ 69. ________________ 70. ________________ 71. ________________ 72. ________________ 73. ________________ 74. ________________ 75. ________________ 76. ________________ 77. ________________ 78. ________________ 79. ________________ 80. ________________
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• Spring '18
• Jack Smith
• Imperial units, ________________, MATHCOUNTS, Inc.

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