why number 8549176320 is one of a kind?

What breaks yet never falls, and what falls yet never breaks?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

Who has married many women but was never married?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?