TIMO Khối 7 – Vòng Quốc gia (Heat Round) – Đề số 4
📄Description
📋Instructions
📝Exam Questions (25 questions)
Previewing the first 3 questions — the rest is saved for the exam itself.
There are 22 pieces of white chopsticks, 18 pieces of yellow chopsticks and 39 pieces of blue chopsticks mixed together. If you want to get 2 pairs of blue chopsticks and 2 pairs of chopsticks which are not blue in the dark, at least how many pieces of chopsticks are needed to be taken?
Pieces of chopsticks: Chiếc đũa; Mixed: Trộn lẫn; Pairs of chopsticks: Đôi đũa; At least: Ít nhất.
A, B, C, D and E are passing balls. Starting from A, 5th time pass will return to B. Within the pass, there is at least 1 time to A, how many passing methods are there? 5th time:
Lần thứ năm;
At least: Ít nhất
Methods: Cách/phương pháp
If 17743 abcd badc + = , calculatea b c d + + + .
Calculate: Tính giá trị
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