Grade - practice problems - page 5 of 912
Number of problems found: 18228
- 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? - Scholarship 3
The ratio of number of boys to that of the girls in a school is 3:2. If 20% of boys and 25% of the girls are scholarship holders, find the percentage of those who are not scholarship holders? - 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. - Two class train
The ratio of first and second class train fares between two stations is 3:1 and that of the number of passengers travelling between these stations by first and second class is 1:50. If on a particular day USD 1325 be collected, then the amount collected f - 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?
- Two circles 3
Two circles are inscribed in a square whose side is 4 cm. Find the radius of the smaller circle. - Crossing a pole A train 200 m long is moving at a speed of 72 km/hr. How much time will it take to cross a pole?
- The radius 3
The radius of a solid circular cylinder decreases by 20% and its height increases by 10% . Find the percentage change its : (a) volume (b) curved surface area. - 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.
- Monthly income
There are three working people - X, Y, Z. The average monthly income of X and Y is 5050 USD.The average monthly income of Y and Z is 6250 USD, and the average monthly income of X and Z is 5200 USD. What is monthly income of X? - 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?
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