De thi Violympi khoi 8 vong 8910 nam 20152016

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<span class='text_page_counter'>(7)</span> Exam number 319:37 Fill in the blank with the suitable number (Note: write decimal number with "the dot" between number part and fraction part. Example: 0.5). Baì thi số 3.

<span class='text_page_counter'>(8)</span> Question 1: Given the triangle ABC and the bisector BD, AB=5cm, CB=7cm. If the length of AD is 1cm less than the length of CD then the length of AC is Question 2: If then what is the value of ?. cm.. Answer: The value of is . Question 3: The area of a rectangle is 50. If its width is increasing to two times and its length is decreasing to four times then the area of the rectangle is Question 4: The equation Question 5: Find the value of. has. . solution(s).. such that .. Answer: Question 6:. .. Find the solution of the equation Answer: The solution is Question 7: Find the value of such that. . .. . Answer: . Question 8: Three children: Mark, Tom, Andy ate 23 cookies altogether. Tom ate more cookies than Andy, Mark. What is the smallest possible number of cookies that Tom ate? Answer: The smallest possible number of cookies that Tom ate is Question 9: Find the maximum area of a triangle that has the length of two sides are Answer: The maximum area of the triangle is. .. Fill in the blank with the suitable sign (>; =;<) Question 10: Given and To compare:. . .. Vòng 9. Cấp tỉnh. cookies. and. ..

<span class='text_page_counter'>(9)</span> Exam number 119:50 Fill in the blank with the suitable number (Note: write decimal number with "the dot" between number part and fraction part. Example: 0.5) Question 1: Three children want to take a group photo sitting in a row. In how many ways can they arrange their sitting positions? Answer: There are ways. Question 2: How many numbers between 10 to 3000 are multiple 7? Answer: There are Question 3:. numbers.. Calculate: 366-363+360-357+354-351+…+300-297+294-291= . Question 4: Given the point C on the segment AB such that the ratio of AC to CB is 3:7. Find the length of BC if the length of AB is 30 cm. Answer: The length of BC is cm. Question 5: Subtract 100 from 7 times of a number A, the difference will be 68 more than 5 times the value of A. Find the value of A. Answer: The value of A is . Question 6: The figure below is made of 2 squares of different sides (the length of sides are integer numbers). Find the perimeter of the figure if its area is .. Answer: The perimeter of the figure is Question 7: Find the maximum value of the expression. cm. .. Answer: The maximum value of B is . Question 8: The perimeter of a rectangle is 34 cm. If its length is increasing 5 cm and its width is increasing 3 cm then the area is increasing 80 . Find the original area of the rectangle. Answer: The original area of the rectangle is . Question 9: Mark rides bicycle from his house to school with a speed of 15 km/h and arrives at the school 20 minutes late. However, if he rides with 20 km/h, he would reach the school only 5 minute late. Find the distance between his house and the school. Answer: The distance between his house and the school is. km..

<span class='text_page_counter'>(10)</span> Question 10: Given the triangle ABC, two bisectors BD and CE. Find the length of the side BC if and the perimeter of ABC is 50 cm. Answer: BC=. cm..

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<span class='text_page_counter'>(16)</span> Vòng 10 cấp quốc gia.

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<span class='text_page_counter'>(25)</span> Exam number 319:50 Fill in the blank with the suitable number (Note: write decimal number with "the dot" between number part and fraction part. Example: 0.5) Question 1: How many sides does a polygon have if the number of its diagonals is as triple as the number of its sides? Answer:The number of its sides is Question 2: Find the positive value of such that Answer: Question 3:. . is a root of the following equation:. .. Find the greatest integer number. such that the value of. Answer:The greatest integer number Question 4:. is. The number of roots of the equation Question 5: Find the remainder when Answer:The remainder is Question 6: Given If. .. is greaterthan the value of. . is. . is divided by. . . then the value of the. .. ..

<span class='text_page_counter'>(26)</span> sum is . (write your answer by decimal in simplest form) Question 7: A rectangle has a length of 60 cm and a width of 30 cm.It is cut into2 identical squares,2 identical rectangles and a shaded small square. Find the area of the shaded square.. Answer:The area of the shaded square is Question 8: If. satisfy these equations. is . Question 9: The number of ordered pairs. and. where. is . Question 10: Let ABCD be the square with the side length that. .. and. then. then the value of. such that. .If. is a perfect square. and. lie on .. respectively such.

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