In a class, there are 30 girls and 15 boys and total average weight of class is $$47{7\over15}$$ kg. The total average weight of boys is 58 kg. Find the approximate average weight of girls. 

What is the greatest common factor of 2³ × 7² and 2⁵ × 3¹?

The average weight of three men is increased by 4 kg when one of them, whose weight is 100 kg, is replaced by another man. What is the weight of the new man? 

Directions: The following questions are accompanied by three statements (A) or (I), (B) or (II), and (C) or (III). You have to determine which statement(s) is/are sufficient/necessary to answer the questions.

Find the number of days in which Q can do a job if P can do the same job in 8 days.
A. Q is 60% more efficient than P.
B. P and Q together can do the job in 3days.
C. P is 37 %less efficient than Q.

A sum of money becomes Rs 16000 in 6 years at the rate of 25% per annum simple interest. What is the total interest for 6 years?

The total of the ages of Kiran, Shantanu and Saransh is 93 years. Ten years ago, the respective ratio of their ages was 2 : 3 : 4 . What is the present age of Saransh?

A cycle seller gives 10% discount on marked retail price and still earns 26% profit. If marked retail price of the cycle is Rs. 840/- Then how much money was paid by the seller for that cycle?

If $$\sqrt { 3}=1.732$$ then the find the value of $${9+2{ \sqrt { 3}}}\over  \sqrt { 3}$$