Decode below rebus
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S , D

Why do you find that most of the buildings are deprived of the 13th floor?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

Why do we preferably have round manhole covers and not square ones?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Why do Chinese men eat more rice than Japanese men do ?

Count the number of lines in the image below ?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

It is always ahead of me yet I can never see it. What is it?

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?