Three numbers are such that if the average of any two of them is added to the third number, the sums obtained are 168, 174 and 180 respectively. What is the average of the original three numbers?

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

The fourth root of 24010000 is 

How many times the keys of a typewriter have to be pressed in order to write number from 121 to 1346?

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

The number of pairs of natural numbers the difference of whose squares is 45 will be –

How many number are there from 700 to 950 (Including both) which are neither divisible by 3 nor by 7?

The sum of 17 consecutive numbers is 289. The sum of another 10 consecutive numbers, whose first term is 5 more than the average of the first set of consecutive numbers is: