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

There are a hundred statements.

First person says: At least one of the statements is false.

Second person says: At least two of the statements is false.

Third person says: At least three of the statements are false.

Fourth person says: At least four of the statements are false.

..

..

..

Hundredth person says: At least a hundred of the statements are false.

Analysing it, how many statements do you think are false and how many are true?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

The cream is heavier than Milk. True or False?

If 1+9+8=1, what is 2+8+9?

What is the last thing you take off before bed?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

I always drive my customer away.

Who am I?