tính nhanh
13-15+17-19+21-23+25
Edmond was one of 14 athletes in the track - and - field team. They are numbered from 1 to 14. The sum of the numbers of the other 13 is athletes 100.
What is Edmond's number?
if a is the largest prime number less than 1000 , then what is the smallest non - zero natural number b so that a+b is also a prime number?
Answer: b = .......
Câu 1 :Each of cars can take 8 people. How many cars needed to take 124 people?
Câu 2 : How many integer numbers between 200 and 300 are there for which the hundreds digit equals the sum of the other two digits?
Câu 3 : The average of five numbers is 20. The average of the five number is 18 when one of the numbers is chaned to 4. What is the orginal value of the changed number?
Câu 4 :A book has 250 pages starting at number 1. How many digits are there in the page numbers of the book?
Câu 5 : Find A, if A is 3 less than the average of 48; 55; 29 and A. The value of A is…
Câu 6 : The sum of denominator and numerator of a fraction is 121 and the fraction is equal to 4/7. Find the denominator of the fraction?
Câu 7 : The sum of two numbers is equal to 77. If the first number is multiplied by 8 and the second by 6, the two product are equal. The larger of these numbers is…
Câu 8 : Which is the greatest 2 - digit number divisible by 2, 3 and 4?
Câu 9 : Calculate: (1 + 2/5) x 6/7.
Câu 10 : Give the number sequence: 1, 4, 7, 10, 13, … Find the 15th term of the number sequence.
what is the largest 3 - digit number so that it has a remainder of 2
when is being divided by 4 and it has a remainder of 4
Tính :
\(\dfrac{25^5+25^7+25^9}{5^{11}+5^{13}+5^{15}+5^{17}+5^{19}+5^{21}}\)
when x dividdie 49 the quoctien is greater tha 1 digit number and the remainder is the possible number .find x
A 3 - digit number when divided by 57, the remainder is 27, when divided by 217 the remainder is 60. Find the number.
1, _ _ _ I have a look
2, My brother likes _ _ sing French songs because he lived in France
3, how _ _ _ _ _ does your mother go jogging
4, What is the _ _ _ _ _ of that book
5, What is there _ _ eat for dinner every day
6, our class is going to visit ha noi capital next mo_ _ _
7, I can hear _ _ _ _ my ears
8, It 's time for you _ _ go to school