A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

what does this picture(rebus) riddle means ?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

It belongs to you, but other people use it more than you do. What is it?

You see me once in June, twice in November, and not at all in May. What am I?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

You can see three almost identical images below. Can you spot the odd one out from them?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

The dirtier I get, the whiter I look. Who am I?

If it took eight men ten hours to build a wall, how long would it take four men to build it?