What happened when the wheel was invented?

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

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

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

Can you count the number of matches in the picture below ?

I travel all around the world but always stay in the corner. What am I?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

What is the Surname of Barbie Doll?

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?