Find the difference between simple interest and compound interest on a sum of Rs 600, compounded annually at the rate of 5% for 2 years.

Find the compound interest on a sum of Rs 425 compounded half yearly for 2 years at the rate of 4%.

The average score of a batsman after 70 matches is 20. He played three matches in the next series with the scores 0, 24, 36 respectively. Find the average score of a batsman after the series.

Find the ratio of volume of cylinder and cone if the radius of cone and cylinder is same and the height of cylinder is twice that of cone.

A 80√3cm person  tall standing at some distance from pole whose height 200√3 is  cm . Find the distance between the pole and the person, if the top of pole makes an angle of  60^0 with the head of person.

List price of pen is Rs 50. A seller bought a pen at a price equal to Rs 30. He sold the pen at a profit of 10%. Find the discount percent.

Thrice the time taken by the boat travelling downstream a distance of 10 km is equal to four times the time taken by the boat travelling upstream for the same distance. Find the ratio of speed of boat in still water and that of current.

A and B invested Rs 10,000 each on a project. After 1 year C joined them and invested Rs 15,000. The profit at the end of 3 yr is Rs 9, 00,000. Find the profit share of A, B, C.

Find the value of 30% of x if 75% of x  is equal to 25% of y .

A is 20% more efficient than B. If B can do a work in 9.6 days, then in how many days can A do the same work.