When a positive integer n is divided by 5 the remainder is 2. What is the remainder when the number 3n is is divided by 5 ?

The sum of three consecutive numbers is 87. The middle number is : 

What is the smallest number of 5 digits which is exactly divisible by 12, 24, 48, 60 and 96?

Which of the following is the largest fraction   $${6\over7},{5\over6},{7\over8},{4\over5} ?$$ 

x is a five - digit number. The digit in ten thousand's place is 1. The number formed by its digits in unit's and ten's places is divisible by 4. The sum of all the digits is divisible by 3 . If 5 and 7 also divide x, then x will be: 

The greatest 4-digit number which is a perfect square is

The product of two numbers is 45 and their difference is 4. The sum of squares of the two numbers is

Find the least number which when divided by 12, 15, 18 and 27 leaves remainders 10, 13, 16 and 25 respectively.