What do you think with the below Picture ?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

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

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

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

What is the next number in the series?

15 29 56 108 208 ?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Can you find out the missing number in the grid?