A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Which word does the below Plexor means ?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

What building has the most stories?

How can you take 2 from 5 and leave 4?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.