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

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

Which Burger Is Different in below image?

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

Can you decipher the below rebus?

PBLUESAISNUERSES

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months