Math practice for 13 year olds - page 4 of 434
Number of problems found: 8665
- Two trains 15
A train travelling 50 kmph leaves Delhi at 8 AM and another train travelling 70 kmph leaves Delhi at 11 AM in the same direction. How many km from Delhi will they be together? - Five men
5 men or 9 women can do a piece of work in 19 days, in how many days will 3 men and 6 women do it? - A business
Two people, A and B starts a businesses. A began a business with $ 21000 and is joined afterwards by B with $ 36000. After how many months did B join, if the profits at the end of the year are divided equally? - Children ratio
In a certain office 1/3 of the workers are women,1/2 of the women are married and 1/3 of the married women have children. If 3/4 of the men are married and 2/3 of the married men have children, what part of the workers is without children? - A long train
A train passes a standing man in 6 sec and 210 m long platform in 16 s . Find the length and the speed of the train. - The profit 5
A man buys 12 pens for 60 eur and sells them at 5 pens for 30 euros. What is his profit percentage? - Shares 1300 USD are divided among A, B, C and D in such a way that: share of (A/B)=(B/C)=(C/D) = (2/3)
- Spheres - ratios
The surface area of two spheres are in the ratio 1 : 4 . Find the ratio of their volumes. - Antecedent and consequent
In a ratio which is equal to 5:8, if the antecedent is 40, then find the consequent. - Avg velocity
A car travels 120 km at 60 km/hr and another 120 km at 40 km/hr. What is its average speed? - Direct proportional If m is proportional to n and m=5 when n=4, then what is the value of m when n=18?
- Percent to number
If 75% of a number is 225, what is the number? - Three people Three people - Peter, Quinton and Roland. 5 years ago, the average age of P and Q was 15 years. Present average age of P, Q and R is 20 years. Find the age of R after 10 years.
- Common work 39 men can repair a road in 12 days working 5 hours a day. How many days will be required to complete the work by 30 men working 6 hours a day?
- Big school 2
The ratio of the number of boys to the number of girls in a school of 450 pupil is 4 : 5 . When some new boys and girls are admitted, the number of boys increases by 25 and ratio of boys and girls changes to 9 : 13 . Calculate the number of new girls admi
- Worker 25 Worker A can do 2/3 of a certain work in 12 days and B can do 1/6 of the same work in 4 days, Find in how many days will they together complete the work?
- Three workers 7
The daily wages of workers A, B and C are in the ratio 7:6:10. If C earns 80 EUR per day; find the per day earnings of A and B. - 5 years 5 years ago the age of a father was thrice the age of his son. In 5 years time, the age of the father will be twice the age of his son at that time. Find their present ages.
- Money exchange A told B, "If you give me 1/3 of your money I'll be 50 USD". In turn B told A, " If you give me 9 USD then we'll be the same amount of money". Find their money.
- Solve 29
Solve for x. 8=2x+4
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