2015_Solutions_Grades 3-4-2015_Solutions_Levels

2015_Solutions_Levels_3&4

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The Math Kangaroo 2015 Solution Suggestions for Levels 3 and 4 are intended to provide answers and explanations for questions geared towards young students. The document includes solutions for a range of problems from 1 to 24, listed by their designated option letters (A, B, C, D, E) as selected answers. For example, the solution to Problem 1 is E, with the explanation given, "15."<br /><br />Here are a few highlighted solutions with explanations:<br /><br />- For Problem 2, the solution involves determining the longest strip based on hole placement between screws during overlap. Strip A, with the smallest overlap (1 hole), is the longest.<br /><br />- Problem 4 provides a comparison of mathematical expressions, pointing out order-of-operations considerations to conclude that (1000-1) ÷ 9 is the largest result. <br /><br />- Problem 6 talks about finding two numbers whose product is a given number, while Problem 8 uses basic knowledge of days to determine it's Saturday after 30 days from a Thursday start.<br /><br />- For Problem 13, a logical strategy and simple arithmetic reveal that Tom is 4th, as there are 3 skaters before him.<br /><br />- Problem 20 explores combinations of numbers to establish that numbers either 5 or 7 in the center yield equal sums for paired surrounding numbers.<br /><br />The solutions blend logical reasoning, arithmetic, and geometric spatial reasoning, tailored to aid understanding for young mathematics enthusiasts. Overall, the document presents well-explained steps, including practice of basic math concepts, number relationships, spatial visualisation, and following instructions — all woven in a format digestible for children at the specified educational level.

Keywords

Math Kangaroo

2015 solutions

Levels 3 and 4

problem-solving

arithmetic

logical reasoning

spatial reasoning

mathematical expressions

educational math

young students