**Category** > **PSC Online Preparations of General Science | Biology P**

Q 1. The LCM of two numbers is 2310 and HCF is 30. If one of the numbers is 210, then what is the other number?

Q 2. In a 30 litre mixture of milk and water, the ratio of milk and water is 7:3. How much water should be added in the mixture so that the ratio of milk and water becomes 3:7?

Q 3. A and B can together do a work in 6 days. A can do it alone in 9 days. In how many days can B do it alone?

Q 4. The average marks obtained by 120 students in an exam is 35. If the average marks obtained by successful students is 39 and the average marks obtained by unsuccessful students is 15 then what is the number of successful students?

Q 5. A train travels from A to B at the speed of 20 km./hr. and from B to A at the speed of 30 km./hr. Then what is the average speed of train in km./hr.?

Q 6. There is a loss of 12 percent on an article being sold for Rs. 352.88, then the cost price of the article is

Q 7. National Income estimates in India are prepared by

Q 8. MS-Word is an example of _____

Q 9. The staple food of the Vedic Aryan was

Q 10. Ctrl, Shift and Alt are called .......... keys.