The rate of work of A and B is in the ratio 2 : 3. What will be the ratio of the days taken by them to complete the work?

Aman and Raman together can complete a work in 30 days, Raman and Manan can complete the same work in 36 days and Manan and Aman can complete the same work in 45 days. In how many days can all three together complete the work?

In an isosceles triangle, if the unequal angle is twice the sum of the equal angles, then each equal angle is

P can do $${1\over 2} $$ of a work in 10 days and Q can do $${1\over 5}$$of the same work in 4 days. In how many days can both finish the work, working together?

The total sum of amounts of A and B at the end of 4 years and 2 years respectively on the same principal is Rs. 20,020. If A is charged Simple interest at the rate 10% and B is charged Compound interest at the rate 5%. The principal is?

The rates of working of A and B are in the ratio of 2 : 3. The number of days taken by each of them to finish the work is in the ratio : 

The diameters of two circles are 12 cm and 20 cm, respectively and the distance between their centres is 16 cm. Find the number of common tangents to the circles.

The least number that should be added to 35460 so that the sum is exactly divisible by 3, 4, 5 and 7 is: