Math practice for 13 year olds - page 11 of 357
Number of problems found: 7130
- Two angles
If one angle of a parallelogram is 24° less than twice the smallest angle, then find the largest angle of the parallelogram. - Students 48
If 80% of the students of a school are boys and 225 are girls, find the number of all students. - Three workers
A can do a work in 16 hours, and B alone in 24 hours. If A, B, and C work together and finish it in 8 hours, then C alone can finish it in how many hours? - Average cost
A man bought 1 dozen banana at Rs 60 and 8 apples at Rs 120 . What is the average cost of each?
- A man 19
A man buys apples at a certain price per dozen and sells them at eight times that price per hundred, find his gain or loss percent - Adjust numerators
If the numerator of a fraction is increased by 2 and the denominator by 1, it becomes 5/8. If the numerator and the denominator of the same fraction are each increased by 1, the fraction becomes 1/2. Find the fraction. - A rectangle 14
A rectangle is 8 cm long and 5 cm wide. Its perimeter is doubled when each of its sides is increased by x cm. From an equation in x, find the new length of the rectangle. - Increase and decrease
A number is first increased by 20% and the resulting number is then decreased by 10%. Find the overall change in the number as percent. - A,B,C,D
A, B, C, D are four consecutive odd integers and their average is 42. What is the product of B and D?
- Greatest number What is the greatest number that will divide 62, 78, and 139, leaving remainders 2, 3, and 4, respectively?
- Secondary 5 Secondary Middle School has 1200 students. Each student takes 5 classes a day. Each teacher teaches 4 classes. Each class has 30 students and 1 teacher. How many teachers are there at Secondary Middle School?
- Smaller square
Let the points A, B, C and D are midpoints of the sides of the square PQRS. If the area of PQRS is 100 sq cm, what is the area of the smaller square ABCD? - Five percents What is 5% written as a decimal?
- A trader A trader sold two saree at Rs 96 each & it causes the same% of profit and loss to each saree. If, as a whole he gets total loss of 4%, then what is the gain/loss% in the sale?
- The area 5
The area of a rhombus is 144 sq cm. If one of the diagonals is double the other, find the length of the diagonals. - A thief
A thief is spotted by a policeman from a distance of 100 metres. When the policeman starts the chase, the thief also starts running. If the speed of the thief be 8 km/hr and that of the policeman 10 km/hr . How far the thief will have run before he is ove - The price 9
The price of sugar is increased by 25%. Find by how much percent a family must reduce their consumption so that their expenditure may increase only by 10%. - Two parts of a run
Adam can cover a certain distance in 1 hour 24 min by covering two-thirds at 4 km/hr and the rest at 5 km/hr. Find the total distance. - Percentages 14 If 20% of a number is 40, what is 30% of the same number?
The average speed of a bus is three-fourths the average speed of a train. The train covers 240 km in 12 hours. How much distance will the bus cover in 7 hours?Do you have unsolved problem that you need help? Ask a question, and we will try to solve it. Solving math problems.
