What will be the compound interest (compounded annually) of 3 years at the rate of 12.5 percent on an amount of Rs. 5120?

simplify the following equation
$$ (1-{1\over3})(1-{1\over4})(1-{1\over5})......(1-{1\over n})$$

Directions: Study the following table carefully to answer the questions that follow Number of Gold coins (in hundred) produced in Five Different companies during Six Different month.

What was the respective ratio between the number of Gold coins produced from company P in the month may and the number of Gold coins produced from company T in the month June?

A rises from his house at 12 noon towards B’s house at a speed of 8 km/hour. After 1 hour, B rides from his house towards A’s at a speed of 7 km/hour. If the distance between the two houses is 68 km, the time when they meet is

If 5sinθ – 4cosθ=0, 0°˂θ˂90°, then the value of θθθθ is:

What is the area of an equilateral triangle having altitude equal to cm.

Radhe buys two TVs at the same cost price, one of them is sold at profit and the other at   profit, then the difference between their selling price is Rs . Find the cost price of the TV.

The simple interest on a certain sum of the money at 4 % per annum for 4 years is Rs.80 more than the interest on the same sum for 3 years at 5 % per annum. Find the sum.