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2020_Solutions_Grades 3-4
2020_Solutions_Levels_3&4
2020_Solutions_Levels_3&4
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The document provides solution suggestions for the Math Kangaroo 2020 competition, specifically for levels 3 and 4. It includes question numbers followed by their corresponding answers and explanations.<br /><br />1. Question 1's answer is (E), identifying the mushroom photo taken on Tuesday from a sequence based on height comparisons.<br /><br />2. Question 2's answer is (E), involving pattern recognition with four-ray pointy shapes.<br /><br />3. Question 3 concludes with answer (A), calculated through a step-by-step shape transformation.<br /><br />4. Question 4 highlights (A) as the correct answer by comparing shaded and non-shaded areas across multiple configurations to determine which has the largest shaded region.<br /><br />5. For Question 5, the solution is (E), which matches the original assortment of six given shapes exactly.<br /><br />6. Question 6 calculates Elli’s jumping pattern, reaching a maximum of 19 (D).<br /><br />7. Question 7, a cube puzzle, deduces that a fly sticker is opposite the duck sticker, answered by (E).<br /><br />8. Problem 8 finds that removing pieces of length 5 and 6 covers the grid completely, allowing the use of up to 5 pieces – answer (C).<br /><br />9. Question 9’s answer (C) involves counting red pieces to follow the rotational pattern, resulting in a total of 3 red pieces.<br /><br />10. Question 10, based on visual recognition, excludes answers with wrongly positioned pyramid edges, choosing (C).<br /><br />11. Question 11 determines the dog’s path based on the leash length, finding that it can reach 4 bones (D).<br /><br />12. For Question 12, the calculation of pole numbers results in 42 (E).<br /><br />13. Question 13 concludes the kangaroo climbs 70 steps before meeting the rabbit, going up 7 steps each cycle – answer (D).<br /><br />14. Solving for a secret number, Question 14 yields an answer of 9 (D).<br /><br />15. Question 15 concludes that number 4 fills the correct spot on a token, chosen as (D).<br /><br />16. Question 16 finds that 3 short sticks and 3 long sticks can form its sides (B).<br /><br />17. For Question 17, a dice sequence results in a top face number and a summarized result of 7 (A).<br /><br />18. Answer (C) to Question 18 identifies a prohibited ice cream combination: lemon with a wafer.<br /><br />19. In Question 19, the series of name combinations meets criteria only in the set Abbey Lilly Cora (A).<br /><br />20. Question 20 calculates a missing number in a sequence to be 6 (D).<br /><br />21. Question 21 explores color combinations for six parrots, discovering five more colored possibilities (D).<br /><br />22. For Question 22, the membership logic puzzles determine there to be 8 teams (D).<br /><br />23. Figure arrangements in Question 23 show that shape (B) can't be divided into five-square parts, resulting in (B).<br /><br />24. Finally, in Question 24, the computation of 942 maximizes the subtracted number's minimal role, producing (D) as the calculated answer.
Keywords
Math Kangaroo 2020
solution suggestions
levels 3 and 4
question answers
explanations
pattern recognition
shape transformation
cube puzzle
grid coverage
color combinations
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