Find the hidden tiger in the given optical illusion ?

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

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Spot 5 differences in two Christmas tree below:

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

I make two people out of one. What am I?

Can you find out who is the kidnapper in below Picture and why, Explain ?