de thi violympic toan tieng anh lop 8 vong 8 nam 2015 2016

VnDoc - Tải tài liệu, văn pháp luật, biểu mẫu miễn phí Đề thi Violympic Tốn Tiếng Anh lớp vòng năm 2015 - 2016 Question 1: If x3 + 2x2 + kx + is divisible by x - then k = … Question 2: Given a square with the length of one side is cm and a isosceles triangle with the length of its base is 12 cm If the area of the square is equal to the area of the isosceles triangle then what is the length of the height of the isosceles triangle, in cm? A 32/3 B 23/3 C 16/3 D 8/3 Question 3: If x = 2y then Question 4: Given A = 9x2 + - 12x and B = To compare A … B A A > B B A < B C A = B D No be compared Question 5: The triangle ABC has three bisectors AM, BN, CP of the angles at A, B, C respectively Then the value of is … Question 6: Given the rectangle ABCD and the triangle BEC Find the value of x such that the ratio of the area of the rectangle to the area of the triangle BEC is 7:3 Answer: x = cm VnDoc - Tải tài liệu, văn pháp luật, biểu mẫu miễn phí Question 7: A survey showed that of 120 secondary school students: 52 of them have a dog, 31 of them have a cat and 19 of them have both How many of the 120 students have neither a dog nor a cat? Answer: students Question 8: The number of the solutions of x4 + x3 + 2x2 + x + = is Question 9: 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 cookies Question 10: The average of three numbers is 42 All three are whole positive number and are different from each other If the least number is 20, what could be the greatest possible number of the remaining two numbers? Answer: VnDoc - Tải tài liệu, văn pháp luật, biểu mẫu miễn phí Đáp án đề thi Violympic Toán Tiếng Anh lớp vòng năm 2015 - 2016 Question 1: -5 Question 6: Question 2: A Question 7: 56 Question 3: -3 Question 8: Question 4: D Question 9: Question 5: Question 10: 85 ... đề thi Violympic Tốn Tiếng Anh lớp vòng năm 2015 - 2016 Question 1: -5 Question 6: Question 2: A Question 7: 56 Question 3: -3 Question 8: Question 4: D Question 9: Question 5: Question 10: 85 ... secondary school students: 52 of them have a dog, 31 of them have a cat and 19 of them have both How many of the 120 students have neither a dog nor a cat? Answer: students Question 8: The number