I am sure no one can have two things for dinner. what are they?

Why Wine Glass Stem is so long?

Replace the question mark with the number below given a simple math problem.

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

What is the centre of gravity?

How can one talk without saying a single word?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

Find the missing number in the series below

13 -21 34 -55 ? -144

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?