Sujet: phone numbers liste de sujets
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	Six-digit telephone numbers		2020-03-12
		Lulamile pose la question : What is the probability that a six-digit telephone number has no repeated digits? The telephone number cannot begin with a zero Penny Nom lui répond.
	Missing digits in a phone number		2015-01-07
		Janelle pose la question : I had a friend try and play a game on me, regarding phone numbers, so I only know the area code , and the last four digits of the phone number. Which means, there are 3 digits that I need to figure out all the possibilities to. Penny Nom lui répond.
	Four digit phone numbers		2014-02-25
		Tom pose la question : Hi, I'm an online math teacher, working on lessons for my students. This question is in their book and I can't do it...! Help! It has to do with phone numbers, and in this problem, we are only dealing with the last 4 digits of the number. It asks how many possible numbers we have if at least one digit repeats in the last 4 digits of the number. Penny Nom lui répond.
	7 digit phone numbers		2013-12-08
		Sean pose la question : Hi I was wondering how you would calculate how may 7 digit phone numbers there are with only odd digits? Penny Nom lui répond.
	Missing three digits in a phone number		2009-01-30
		Elmer pose la question : I have part of a phone number. the first 3 digits are 212, the last digit is four, and the three missing digits are all odd, how many numbers will I have to call to get the right number? 212- _ _ _ 4? Stephen La Rocque and Penny Nom lui répond.
	Some phone numbers		2008-06-30
		star pose la question : What do you think the probability of finding the last 3 digits of a telephone number if the 1st digit begins with 7? Janice Cotcher and Harley Weston lui répond.
	Phone number combinations		2007-01-04
		Efrain pose la question : i want to know the different combinations for numbers 7 digits the number are 0-9 its basically the different phone number combinations example: 555-6689 or 565-4896 i just want to know for many different combinations are there.... Penny Nom lui répond.
	Phone Number Possibilities		2000-01-09
		Hamilton Weston pose la question : How do phone companies arrive at the possible number of phone numbers that can be generated for customers? Harley Weston lui répond.

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