How is a fly different from a mosquito?

The current time can be represented by below textual rebus.

0
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B.Sc
LLB

Can you tell us the current time?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

Can you solve the below tricky visual equation?

Why is a river so rich ?

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?

An old Woman left INR 33,333 to be divided equally among two fathers and two sons and each was to receive INR 11,111.
How was this possible?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?