How can you leave a room with two legs and return with six legs?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

What month of the year has 28 days?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

'Ferrari driver' easily beats the 'force driver' in a two-car race. How did Indian newspapers truthfully report so to look as a 'force drive' had outdone the 'Ferrari driver'? Think!!!

Look at the picture and find out which square is not linked with any of the other squares.

How many triangles can you find in this given picture?