CBSE - Aptitude Mathematics

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? 1. 10 2. 12 3. 15 4. 20

A boy has 3 library tickets and 8 books of his interest in the library. Of these 8, he does not want to borrow Chemistry Part II, unless Chemistry Part I is also borrowed. In how many ways can he choose the three books to be borrowed ? 1.56 2.27 3.26 4.41

If the ratio of the radii of two circles is 3 to 2, then the ratio of the areas of the two circles is 1. 2 to 3 2. 3 to 4 3. 4 to 9 4. 9 to 4

In a flight of 3000 km, an aircraft was slowed down by bad weather. Its average speed for the trip was reduced by 100 km/hour and the time increased by one hour. Find the original duration of the flight. 1. 5 hours 2. 6 hours 3. 4 hours 4. 10 hours

A starts a business on Jan.1 with an investment of Rs.80,000. Four months later B joins with an investment of Rs.60,000. The percentage of profit B will get at the end of the year is nearly 1.42% 2.37% 3.33% 4.31%