Don't forget to check your flight number
He eats so much chocolate so he is overweight
Don't forget to check your flight number
He eats so much chocolate so he is overweight
Exer 1: There is a division with the quotient is 6 and the remainder is 3. The sum of dividend, divisor and remainder are 195. Find the dividend are divisor.
Exer 2: Prove that: Amoney three consecutive natural numbers, there is one only one the number which divisibles by 3.
Exer 3: Given natural number, n = \(\overline{1ab1}\). Let m be the natural number which is written the opposite respectively of n. Prove that the different of n and m divisibles by 90.
Exer 1: Given two natural numbers whose sum are 78293. The bigger number where 5 is the units digit and 2 is hundred digit. If we clean these digits then we obtain a number which equals the smaller number. Find two natural numbers.
Exer 2: Prove that: If x, y \(\in\) N and x + 2y divisible by 5 then 3x - 4y divisibles by 5.
Exer 3: Given that 2x + 5y \(⋮\) 7. Prove that 4x + 3y \(⋮\) 7.
Mr Nam deposited some money in a bank . The annual interest rate is 2% . After one year he got all $16728 . How much did he deposit in the bank at first
( Dịch , trình bày cách làm bằng tiếng việt , trình bày đầy đủ )
TÌM MỘT LỖI SAI Ở MỖI CÂU SAU VÀ SỬA LẠI CHO ĐÚNG
1. staying at home all day sounds boringly to me
2.people are living longer so there are more elder people
3. suger is an unhealthy food because we need it to live
4. some boys are playing marble in the schoolyard
5. they are going to listen to the radio and reading a book tonight
Hãy đặt câu hỏi cho phần in đậm trong những câu sau :
1. The boys are playing football in the school yard.
2. He often goes swimming in the morning.
3. The children are going to school by bus.
4. My father is watching the news on TV.
5. My mother is cooking dinner in the kitchen.
HELP ME ~
Chia động từ
1. When I got home I found that water ..... down the kitchen walls.(Run)
2. After he ...... his English course, he went to England to continue his study. (finish)
3. How .......since we ....... college
A. are you - left
B.were you - left
C. have you been - have left
D. have you been - left
4. I .... much of you lately. We ....... three months ago.
A. haven't seen-last meet B. didn't see-met C. haven't seen - have meet D. didn't see - have met
5. The Chinese ...... spaghetti dishes for a long time before Marco Polo ..... back to Italy
A. Made-brought B. Have made-brought C. made - havd brought D. had been making-brought
6. When I arrived at the meeting the first speaker ..... speaking and the audience ........
A. just finished-were clapping
B. had just finished-had clapped
C. had just finished-were clapping
D. just finished-had clapped
7. He ..... his job last month and then he.........out of work
A. lost-was B. was lost-had been
C. has lost-was D. lost-have been
8. In the last hundred years, travelling ...... much easier and more comfortable ( become )
9. In the 19th century, iit ...... two or three months to across North America by covered wagon.
( take)
10. In the past, the trip ...... very rough and often dangerous , but things ..... A great deal in the last hundred and fifty years.
A. was-have changed
B. is-change
C. had been-will change
D. has been -changed
Điền vào chỗ trống
, ,
, .
the nao la cac so nguyen to,hop so?cho vi du
Viết các tập hợp sau bằng cách liệt kê các phần tử:
a) A = {x ∈ N 12 < x < 16};
b) B = { x∈ N* x < 5};
c) C = { x ∈ N 13 ≤ x ≤ 15}