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.
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?
A bag contains green marbles and red marbles only. If the ratio of the number of green marbles to the number of red marbles is 1:4 then ............% of marbles are green.
Giải nhanh hộ mình nha!
Class 6A has 42 pupils. 30 of them joined the Swimming club and 25 of them joined the Gymastic club. All pupils must be a member of at least one club, find the number of pupils who joined both clubs.
Toán tiếng anh:
Several different numbers are written on the board. Exactly two them are divisible by 3 and exactly 9 of them are divisible by 13. Let M be the greatest of these numbers. What is the smallest possible value of M?
A box coutains 15 identical reams paper. The total mass of the box with 1/5of all the reams of paper. The mass of the emty box is 2/7 of a reams of paper . What í the mass of the emty box
From 4 letters ab18 one can make all 18 numbers with 4 digits. (In a number, each digit is written only once.) The sum of all 18 possible numbers is 90216. Find a and b.
The sum of four natural numbers is 1111. Find the largest possible values of highest common factor of these four numbers.