2021_Solutions_Grades 7-8-2021_Solutions_Levels

2021_Solutions_Levels_7&8
Pdf Summary
The Math Kangaroo 2021 solution suggestions for levels 7 and 8 provide detailed problem-solving steps and correct answers for 30 questions. Here's a summarized overview of selected problems:<br /><br />1. <strong>Question 1</strong> involves symmetry, with the solution identifying the axis for the Sagittarius symbol.<br /><br />2. <strong>Question 2</strong> is about calculating the shaded area of a disk, rotating sections to determine a shaded proportion of 50%.<br /><br />3. <strong>Question 3</strong> calculates a mathematical expression to arrive at 84.<br /><br />4. <strong>Question 4</strong> identifies sequences of four-digit numbers, resulting in 6 numbers that fit the criteria.<br /><br />5. <strong>Question 5</strong> is a geometry question requiring piece arrangement to find a calculated answer of -100.<br /><br />6. <strong>Question 6</strong> discusses the filling levels of vases based on symmetry, determining interactions with a mid-plane.<br /><br />7. <strong>Question 10</strong> looks into relative height comparisons leading to a specific height differential conclusion.<br /><br />8. <strong>Question 11</strong> involves chocolate bar partitioning to compute remaining squares.<br /><br />9. <strong>Question 17</strong> involves uncovering missed quiz points, solving equations to conclude the number of incorrect answers left blank.<br /><br />10. <strong>Question 19</strong> examines fruit distribution logic to determine equivalency between categories of fruits taken by different parties.<br /><br />11. <strong>Question 21</strong> involves calculating the shortest path distance, identifying it as 3 km.<br /><br />12. <strong>Question 27</strong> calculates the number of cubes a termite passes through using axis alignment.<br /><br />13. <strong>Question 29</strong> comprehensively answers round scheduling for a series of matches, leveraging logical constraints on player availability.<br /><br />The solutions utilize various mathematical fields including geometry, symmetry, arithmetic, and logical reasoning to derive answers, providing a comprehensive guide for students to understand complex mathematical concepts.
Keywords
Math Kangaroo 2021
solution suggestions
symmetry
geometry
problem-solving
mathematical expression
sequences
logical reasoning
arithmetic
student guide