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During summer break, a group of 5 students are participating in tidying and decorating a park near their houses. They have planned to finish the work in 7 days. However, after 4 days, two students have to stop work to take part in a local sporting competition. Supposing that all the students have the same efficiency in their work, how many days will the rest of the students have to spend completing the work of the whole group?
Question 1: What is the quotient of 0.51 and 17 ? Answer : ......
Question 2: The distance from Anna's house to the store is 1/2 mile . Anna run to the store twice a day , 7 days a week for 3 weeks . How many miles does she run in total ? Answer .....miles
Question 3: Jack needs to earn enough money to buy a new skateboard that costs $48.45 . He has $15.34 . How much money does he need to buy the skateboard ? Answer: $.........
A guard units have a rice stockpile enough food for 650 people in 40 days. Ask that sufficient quantities of rice to feed 400 people how many days.
Combinatorics21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?Different way: Cách khác nhau.22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form 3-digit numbers. H...
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Combinatorics
21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?
Different way: Cách khác nhau.
22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?
At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.
23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form 3-digit numbers. How many even number(s) greater than 300 is / are there? (The repetition of digits is not allowed)
Digit: Chữ số; 3-digit number: Số có 3 chữ số; Even number: Số chẵn; Greater than: Lớn hơn; Repetition of digits is not allowed: Các chữ số không được lặp lại.
24. A flight of stairs has 10 steps. Peter can go up for 1 step, 2 steps or 3 steps each time. How many way(s) is / are there for Peter to go up the stairs?
Step: Bước; Way: Cách.
25. Numbers are drawn from 80 integers 20 to 99. At least how many number(s) is / are drawn at random to ensure that there are two numbers whose sum is 85?
Integer: Số nguyên; At least: Ít nhất; Random: Ngẫu nhiên; Ensure: Chắc chắn; Sum: Tổng.
~ End of Paper ~
Combinatorics21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?Different way: Cách khác nhau.22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form 3-digit numbers. H...
Đọc tiếp
Combinatorics
21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?
Different way: Cách khác nhau.
22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?
At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.
23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form 3-digit numbers. How many even number(s) greater than 300 is / are there? (The repetition of digits is not allowed)
Digit: Chữ số; 3-digit number: Số có 3 chữ số; Even number: Số chẵn; Greater than: Lớn hơn; Repetition of digits is not allowed: Các chữ số không được lặp lại.
24. A flight of stairs has 10 steps. Peter can go up for 1 step, 2 steps or 3 steps each time. How many way(s) is / are there for Peter to go up the stairs?
Step: Bước; Way: Cách.
25. Numbers are drawn from 80 integers 20 to 99. At least how many number(s) is / are drawn at random to ensure that there are two numbers whose sum is 85?
Integer: Số nguyên; At least: Ít nhất; Random: Ngẫu nhiên; Ensure: Chắc chắn; Sum: Tổng.
~ End of Paper ~
1. A machine P can print one lakh books in 8 hours, machine Q can print the same number ò books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M. While machine P is closed at 11 A.M . And the remaining two machines complete work (to print one lakh books) be finish?2.A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days. Then, C alone can do the job in
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1. A machine P can print one lakh books in 8 hours, machine Q can print the same number ò books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M. While machine P is closed at 11 A.M . And the remaining two machines complete work (to print one lakh books) be finish?
2.A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days. Then, C alone can do the job in
The first group of 8 divers person , 3 meals a day , after 5 days ate rice 48.000 g .Top more second mechanic technician first top 2 people and only 2 meals per day for 10 days then eaten bag many kg of rice ? Eat every meal the same level .
A day is called " Factor day '' if the month number times the day equals to the number formed by the last 2 digits of the year . For example, 2nd of September 2018 is a Factor day since 2 x 9 = 18, as well as 8th of February 2016 because 8 x 2 = 16 . How many Factor days are there from 1st of January 2015 to 31st of December 2019
Alex has a great collection of badges that he wants to count. He knows that he has between 120 and 150, but not the exact number. He decides to count them in fives, and he has 2 left over. He then counts them in sixes and he has 3 left over. Can you work out exactly how many badges Alex has?