What does this Rebus Picture means ?

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 number comes next in the series?

5 15 5 18 5 24 14 20 _

What do you answer even though it never asks you questions?

If you say my name, I will no longer exist. What am I?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

In the four images below, can you find the odd one out?

How can you drop a raw egg from a height onto a concrete floor without cracking it?