Directions : The Bar Graph given here shows the population (in crores) of India in various census years. Observe the graph and answer the question based on it.

Peryear increase in population from the year 1931 to 1981 is

The mean of five numbers is 18. If one number is excluded, their mean is 16. The excluded number is:

Find the value of sec θ − tan θ, if sec θ + tan θ = $$ \sqrt { 5} $$

A pen passing through two hands is finally sold at a profit of 44% of the original cost price. If the first dealer makes a profit of 20%, then the profit made by the second dealer is:

Directions: In the following question, two equations are given in variables X and Y. You have to solve these equations and determine the relation between X and Y.

I. X³ = 125
II. Y³ = 8

The simple interest on a sum  of money is $$8\over 25$$ of the sum. If the number of years is numerically half the rate percent per annum, then the rate percent per annum is 

Find the greatest value of (a + b) such than an 8-digit number 4523a60 b is divisible by 15.

1! + 2! + 3! + 4! + ......... + 50! Find the unit digit of?