What is the next number in this series?

4,12,84,3612....

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

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

Count the Triangle in the figure given below:

How many times can you subtract the number 5 from 25?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Which city is three-fifths chick two third cat and 50% goat?

Which letter of the alphabet has the most water?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E