
Helium has
an atomic NUMBER of two.
The Big Bang Theory Season 7, Episode 3

Wrong NUMBER!
The Big Bang Theory Season 10, Episode 4

Although that NUMBER
would be fairly easy to calculate.
The Big Bang Theory Season 4, Episode 1

Okay, you've got my NUMBER.
Now give me the picture.
The Big Bang Theory Season 2, Episode 20

There's an infinite NUMBER
of possibilities.
The Big Bang Theory Season 12, Episode 23