How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Find the value of "?" in the ball picture Riddle below:

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

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