An has 12 marbles more than Binh. If Binh has 4 marbles more, the number of Binh’s marbles is equal to $\frac{3}{5}$ of the number of An’s marbles. How many marbles does the each person have ?

The difference of two numbers is 252. If each number is reduced by 17 unit, the big number is equal to $\frac{1}{3}$ the small number. Find the bif number ?

Find the two numbers, knowing that the first number is 1986 more than their average and the second number is 1985 less than their difference ?

The mount of orange juice and grape juice is 25 litres altogether. How many liters of juice of each type are there, knowing that the amount of orange juice is 4 times that of grape juice ?

The perimeter of a rectangle school garden is 180 m. The width is $\frac{2}{3}$ the length. Find the area of the school garden.

My class has 40 students. The number of boys is quarter the number of girls. How many boys and girls are there ?

Mrs. Mai sold 320 m of silk. The amount of yellow silk is $\frac{5}{3}$ of that of white silk. Find the amount of each type of silk ?

A 36 – meter rope is cut into two segments. The first segment is triple the second one. How long is each segment ?

The average of two numbers is 25. The ratio of the two numbers is 2 : 3. Find the two numbers ?

Class 4A has 30 students. Class 4B has 35 students. The two classes planted 260 trees. How many trees did each class plant  ? ( Each student planted the same number of trees )

Hung worked 4 days. Dung worked 5 days. Nam worked 7 days. They received the total money is 2240000 dong. How much money did each person receive ? ( Each person received the same amount of money for one day . )

In a school, there are 5 boys for every 4 girls. If the school has 720 pupils. How many boys and how many girls are there ?

The first number is double the second number. The second number is double the third number. Knowing that the sum of the three numbers is 42, find each number ?

Divided the first number by the second number, we will get the quotient as 3 and the remainder as 1. Divide the second number by the third number, we will get the quotient as 3 and the remainder as 1, too. The sum of the three numbers is 96, find the three numbers ?

A farm raises 325 oxes . Knowing that the number of cows is haft as much again as the number of bulls. Find the amount of each type of oxes ?