What building has the most stories?

Replace the question mark with the correct number below.

I shave every day, but my beard stays the same. What am I?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

What word is pronounced the same if you take away four of its five letters?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

What is the riddle which can be asked all day with a different correct answer each time.

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?