OK, what I'm going to try and do, is to square in my head a five digit number requiring a 10 digit calculator.

Another, another three digit another three digit number, sir?

In 1980, one could factor a difficult 50 digit number at an expense of 1012 elementary computer operations.

How about a two digit number?

A three digit number, sir, yes?

OK, another, another three digit number, sir?

How many digits are there in your number?

So you should have as an answer either a six digit or probably a seven digit number.

I forget your phone number.

I forget your telephone number.

I forgot your phone number.

My phone number has changed.

So quickly, a two digit number please.

Yes? One more three digit number please.

I forget your phone number.

I forget your phone number.

I forget your telephone number.

Does she know your phone number?

May I leave my phone number?

What's your phone number?

What is your phone number?

Does she know your telephone number?

He asked me for my phone number.

OK, oh, OK you have a 10 digit calculator, sir, as well?

Tom's phone number has changed.

Whose phone number is this?

Arthur Benjamin 22. And another two digit number, Sir?

There was a gentleman up here who had a 10 digit calculator.

The little box has your phone number.

Give me your telephone number.

I forgot his phone number.

Does she know your phone number?

My telephone number is 789.

My phone number is 789.

Is there a mistake in the telephone number?

She always forgets my telephone number.

Tom wants my telephone number.

Here is my phone number.

I want to know your telephone number.

For example, the decimal system (base 10) has ten digits (0 through to 9), whereas binary (base 2) has two digits (0 and 1).

Tom forgot Mary's phone number.

Do you have Tom's phone number?

Tom knows Mary's phone number.

Tom wrote down Mary's telephone number.

Hanoi's telephone numbers have been increased to 8 digits to cope with demand (October 2008).