Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

The host of a game show, offers the guest a choice of three doors. Behind one is a 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?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

What goes through cities and fields, but never moves?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

A man is approaching a broad and barren land. He has a package with him. If somehow, he is unable to open the package before reaching the land, he will die.

Can you guess what is present in the package?