why number 8549176320 is one of a kind?

What Time Should the last watch show in the below figure?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Can you find out the total number of triangles in the given figure?

Consider this about a word: The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

A convention is held where all the big logicians are summoned. The master places a band on everyone's forehead. Now all of them can see others bands but can't see his own. Then they are told that there are different colours of bands. All the logicians sit in circle and they are further explained that a bell will ring at regular intervals. The moment when a logician knew the colour of band on his forehead, he will leave at the next bell. If anyone leaves at the wrong bell, he will be disqualified.

The master assures the logicians that the puzzle will not be impossible for anyone of them. How will the logicians manage ?

What does this rebus riddle mean?