What does this rebus means ?

PROG WORKRESS

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

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

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

The sum of a mother, her baby and her dog's weight is 170 Kg. How much does the baby weigh if the mother weighs 100 kg more than the combined weight of the baby and the dog, and the dog weighs 60 per cent less than the baby?

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

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

What has 88 keys?