TIMO Khối 8 – Vòng Quốc gia (Heat Round) – Đề số 3

There are 6 pieces of white chopsticks, 8 pieces of yellow chopsticks and 10 pieces of blue chopsticks mixed together. If you want to get 4 pairs of chopsticks of the same color in the dark, at least how many pieces of chopsticks are needed to be taken out?

Pairs of chopsticks: Đôi đũa; At least: Ít nhất.

Robert goes east for 28km, goes south for 28km, then goes west for 7km. How many km is he now from the original position?

East: Phía Đông; South: Phía Nam; West: Phía Tây; Original: Ban đầu.

Given that = : 3 : 5 A B , = : 7 :11 B C , = : 2 : 3 C D and + + + = 1161 A B C D . What is the value of B?

Value: Giá trị