The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

I am an odd number. Take away a letter and I become even. What number am I?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?