A total of 57 sweets were distributed in 10 children in such a way that each girl got 6 sweets and each boy got 5 sweets. The number of boys is:

The cost price of an article is Rs. 480. If it is sold at a profit of 12.5 percent, what will be the selling price of the article?

If the least common multiple(LCM) of two numbers is 231, the Highest common multiple(H.C.F)  of both numbers is 11 and the first number is 77, then the second number is

The value of x in the given equation
$$ {23 ^2 + \sqrt{x}=625}$$

The pipe can fill a tank in 36 minutes and the another pipe can empty it in 45 minutes. If both pipes are opened simultaneously, the time (in hours) it takes to fill half the capacity of the tank is:

If 20 women can lay a road of length 100m in 10 days. 10 women can lay the same road of length 50m in: 

Two numbers are more than the third number by 20 % and 50 % respectively. Find the first number is what percent of the second number? 

A sum of Rs. 12,000, deposited at compound interest becomes double after 5 years. How much will it be after 20 years?