Math Kangaroo 2021, Grades 9-10 скачать в хорошем качестве

Math Kangaroo 2021, Grades 9-10

🎯 Math Kangaroo Practice 👉 Year-wise video playlists:    / @boo9x   👉 Past questions & solutions: https://boo9.com/resources/math-kangaroo 00:00 - intro 00:46 - Q1: Each year, the third Thursday in March is named Kangaroo Day. The dates of Kangaroo Day for the next few years ... 02:55 - Q1 (Bonus Example) 08:55 - Q2: Jenny looks at her weather app that shows the predicted weather and maximum temperatures for the next five days. ... 10:32 - Q2 (Bonus Example) 13:02 - Q3: A park is shaped like an equilateral triangle. A cat wants to walk along one of the three indicated paths (thicker lines) ... 15:36 - Q4: Six rectangles are arranged as shown. The top left-hand rectangle has height 6 cm. The numbers within the rectangles ... 17:29 - Q5: The halftime score of a handball match was 9 : 14, thus the visiting team was leading by five goals. As a consequence of ... 20:30 - Q6: In a jazz band, Giuseppe plays the saxophone, Sergio plays the trumpet and Eliana sings. They are all the same age. There ... 22:51 - Q7: Six congruent rhombuses, each of area 5 xxx, form a star. The tips of the star are joined to draw a regular hexagon, ... 27:17 - Q8: A rectangle with perimeter 30 cm is divided into four parts by a vertical line and a horizontal line. One of the parts ... 29:40 - Q9: Ally drew 3 triangles on a grid. Exactly 2 of them have the same area, exactly 2 of them are isosceles, and exactly 2 are ... 32:43 - Q10: The little kangaroo has chosen a special number. She gets the same result when she subtracts xxx from her number as she does ... 34:57 - Q11: Tom had ten sparklers of the same size. He lit one first. When only a tenth of it remained, he lit the second one. When ... 37:59 - Q12: Ahmad walks up 8 steps going up either 1 or 2 steps at a time. There is a hole on the 6th step, so he cannot use this ... 41:42 - Q13: The numbers from 1 to 6 are placed in the circles at the intersections of 3 rings. The position of number 6 is shown. The ... 46:00 - Q14: 2021 has a remainder of 5 when divided by 6, by 7, by 8, and by 9. How many positive integers, less than 2021, have this property? 50:36 - Q15: The figure shows a semicircle with center O. Two of the angles are given. What is the size, in degrees, of the angle xxx 54:56 - Q16: In a team competition, there are 5 teams waiting to start. Each team consists of either only boys or only girls. The number ... 01:01:16 - Q17: Five cars participated in a race, starting in the order shown. Xxx Whenever a car overtook another car, a point was awarded. ... 01:03:26 - Q18: A xxx square initially has the number 0 in each of its cells. In one step all four numbers in one xxx sub-square such as the ... 01:07:21 - Q19: What is the sum of the six marked angles in the picture? 01:10:30 - Q20: There are eight boxes in the strip shown. Numbers in adjacent boxes have sum a or a + 1 as shown. The numbers in the first box ... 01:14:22 - Q21: An ant climbs from C to A on path CA and descends from A to B on the stairs, as shown in the diagram. What is the ratio of the ... 01:20:44 - Q22: The numbers a, b and c satisfy a + b + c = 0 and abc = 78 . What is the value of (a + b)(b + c)(c + a) ? 01:21:51 - Q23: Let N be the smallest positive integer whose sum of its digits is 2021. What is the sum of the digits of N+2021? 01:26:14 - Q24: Three boys played a "Word" game in which they each wrote down 10 words. Each boy scored three points if neither of ... 01:34:35 - Q25: The smaller square in the picture has area 16 and the grey triangle has area 1. What is the area of the larger square, ... 01:40:40 - Q26: Each of the numbers a and b is a square of an integer. The difference a − b is a prime number. Which of the following could be number b? 01:45:26 - Q27: In the 4 × 4 table some cells must be painted black. The numbers next to and below the table show how many cells in that row ... 01:49:54 - Q28: How many five-digit positive numbers have the product of their digits equal to 1000? 01:53:11 - Q29: Christina has eight coins whose weights in grams are different positive integers. When Christina puts any two coins on one ... 02:00:52 - Q30: 2021 balls are arranged in a row and are numbered from 1 to 2021. Each ball is coloured in one of four colours: green, ... 02:06:29 - end #mathkangaroo #matholympiad #mathpractice #mathpuzzle #onlinelearning #boo9