Find the next number in the series below

21 32 54 87 131 ?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

Why did Buffon take the goal with him after every Juventus match?

Find the missing number in the image below.

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

There are forty elephants and they have forty-fore heads. How can this be possible?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?