Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

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

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

You walk into an old horror house. It has no power or plumbing. Once inside, you see three doors. Each door has a number on it. Behind each door is a way for you to die. Behind door number one, you die by getting eaten by a lion. Behind door number two, you die by getting murdered. Behind door number three, you die by an electric chair. You can’t turn back, so you have to go through a door. Which door do you go through?

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Can you spot the hidden girl in the picture below?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

Why blonde cannot dial 911?

Different lights make me strange by changing me into different sizes. What am I?

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