Math practice for 13 year olds - page 2 of 363
Number of problems found: 7241
- 128 USD
128 USD is increased by 20 percentage. Determine the new amount. - Doubling - simple interest A sum becomes its double in 10 years. Find the annual rate of simple interest
- Surface = volume
If the volume and the surface area of a sphere are numerically the same then find its radius. - The radius 4
The radius of a sphere is r=9 cm. What is the volume of this sphere? Use π ≈ 3.14 and round your answer to the nearest hundredth. cubic millimeters
- Collecting money Rs 180 contained in a box of one rupee, 50 Paise and 25 Paise coins in the ratio 2:3:4. What is the number of 50 Paise coins? (One rupee = 100 paisa)
- Working group
20 men complete one-third of a piece of work in 20 days. How many more men should be employed to finish the rest of the work in 25 more days? - 4100 USD 4100 USD was distributed in 50 boys and girls. Each boy got $ 90 and each girl $ 65. Then, find the number of boys.
- Somebody Somebody spend 5% of his wages on paying school fees. That is 800 shillings . How much does he earn?
- By selling 2
By selling 100 pens, a shopkeeper gains the selling price of 20 pens. Find his gain percent.
- 5 yrs 5 yrs ago, the average age of Rasmi and Suravi was 20 yr. Now, the average age of Rasmi, Suravi and Mita is 30 yrs. What will be the age of Mita after 15 years?
- Quarter of 60 grams
For a science experiment, students need to find 25% of 60 grams. John says " I can find this by calculation 1/4 of 60" Andre says: 25% of 60 means 25/100 times 60. Do you agree with either of them? Show your reasoning - Inverse percentages
If a is 40 percent of b then, what percent is b of a? - A baseball
A baseball is hit over the 325 foot fence, which is 110 feet tall. How far did the ball carry on a straight line when it reached the fence? - Fund raising A number of persons decided to raise 3 millions euros by equal contributions from each. Had they contributed 50 euros each extra, the contribution would have been 3.25 millions euros . How many persons are there?
- Price of rice
The price of rice is reduced by 5% . How many kilograms of rice can now be bought for the money which was sufficient to buy 50 kg of rice earlier? - Bananas 5
A fruit vendor was able to sell 85% of his 80 kilograms of bananas. How many kilograms of bananas were sold? - A kite 3
A kite is flying at a height of 60 m above the ground. The string attached to the kite is temporarily tied to a point on the ground. The inclination of the string with the ground is 60°. Find the length of the string, assuming that there is no slack in th - Horses and hens
In a park, there are some horses and some hens. If total number of heads 68 and number of legs together is 198. Then find the number of hens in the park. - Sharing money 2
Ann and Betty shared a sum of money in the ratio is 2:3 and Ann received $120. What is Betty share?
The formula with two variables is given: y=5*x+38. Solve for x.Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.
