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

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

What country can make you shiver?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?

What will you call your mother's brother's brother-in-law?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

I can be cracked, made, told, and played. What am I?

You can see three almost identical images below. Can you spot the odd one out from them?