https://artofproblemsolving.com/wiki/api.php?action=feedcontributions&user=Aallen&feedformat=atom AoPS Wiki - User contributions [en] 2022-01-22T00:31:54Z User contributions MediaWiki 1.31.1 https://artofproblemsolving.com/wiki/index.php?title=2011_AMC_8_Problems/Problem_13&diff=44138 2011 AMC 8 Problems/Problem 13 2012-01-04T01:43:12Z <p>Aallen: Created page with &quot;The overlap length is 5, so the shaded area is 5 * 15 =75. The area of the whole shape is 25*15 = 375 The fraction 75/375 reduces to 1/5 or 20%.&quot;</p> <hr /> <div>The overlap length is 5, so the shaded area is 5 * 15 =75.<br /> The area of the whole shape is 25*15 = 375<br /> The fraction 75/375 reduces to 1/5 or 20%.</div> Aallen https://artofproblemsolving.com/wiki/index.php?title=2011_AMC_8_Problems/Problem_11&diff=44137 2011 AMC 8 Problems/Problem 11 2012-01-04T01:41:41Z <p>Aallen: Created page with &quot;Average the differences between the two times. 10, -10, 20, 30, -20 The sum is 30. Divide by 5 = 6.&quot;</p> <hr /> <div>Average the differences between the two times.<br /> 10, -10, 20, 30, -20<br /> The sum is 30. Divide by 5 = 6.</div> Aallen https://artofproblemsolving.com/wiki/index.php?title=2011_AMC_8_Problems/Problem_9&diff=44136 2011 AMC 8 Problems/Problem 9 2012-01-04T01:40:26Z <p>Aallen: Created page with &quot;Look at the possibilities. The list is short enough. 1+2 = 3 1+4 = 5 1+6 = 7 3+2 = 5 3+4 = 7 3+6 = 9 5+2 = 7 5+4 = 9 5+6 = 11 Possible outcomes: 3, 5, 7, 9, 11 for a total of 5.&quot;</p> <hr /> <div>Look at the possibilities. The list is short enough.<br /> <br /> 1+2 = 3<br /> 1+4 = 5<br /> 1+6 = 7<br /> 3+2 = 5<br /> 3+4 = 7<br /> 3+6 = 9<br /> 5+2 = 7<br /> 5+4 = 9<br /> 5+6 = 11<br /> <br /> Possible outcomes: 3, 5, 7, 9, 11 for a total of 5.</div> Aallen https://artofproblemsolving.com/wiki/index.php?title=2011_AMC_8_Problems/Problem_7&diff=44134 2011 AMC 8 Problems/Problem 7 2012-01-04T01:36:18Z <p>Aallen: Created page with &quot;Assume that the area of each square is one. Then, the area of the shade region in the top left square is 1/4. The area of the top right shaded region is 1/8. The area of the b...&quot;</p> <hr /> <div>Assume that the area of each square is one. Then, the area of the shade region in the top left square is 1/4. The area of the top right shaded region is 1/8. The area of the bottom left shaded region is 3/8. And the area of the bottom right shaded region is 1/4. Add the four fractions: 1/4 + 1/8 + 3/8 + 1/4 = 1. The four squares together have an area of 4, so the percent is 1/4 = 25%.</div> Aallen