What is next number in the pattern below:

131 517 192 123 ?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Kohli and Dhoni decided to have a paintball match.
Kohli told Dhoni, "Sir it is not right as you got thrice the paintballs I have".

Dhoni instantly gives Kohli 10 hit paintballs.
Kohli replied, "Sir, I believe you still have twice the paintballs than I have".

Dhoni gives "?" more paintballs to Kohli.
Kohli replied, "Sir it is even now, Let us have a match".

What is "?".

Why do you find that most of the buildings are deprived of the 13th floor?

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

Can you solve below mathematical equation?

2^1234 - 2^1233

What is the word or phrase?