







Social security numbers 
20070227 

Tish pose la question : Social Security numbers are in the form #########, where each symbol represents a number 09, how many are possible with this format? Will we ever run out of Social Security numbers?
(This is one question with two parts, I saw some examples but I am still confused because if there are 1 million possibilities then how have we been able to issue out numbers to over 280 US citizens?) (For the second part a yes or no answer is sufficient) Penny Nom lui répond. 





A nine digit number 
20060306 

Ryan pose la question : What is the total number of possible combinations of a nine digit number (ie., social security number) including repeating numbers? Stephen La Rocque and Penny Nom lui répond. 





Jack's social security number 
20040608 

A student pose la question : Jack's social security number contains each of the nonzero digits exactly once. By examining the digits from left to right, he also found that 1 divides the first digit evenly, 2 divides the sum of the first two digirs evenly, 3 divides the sum of the first three digits evenly, and so on, until 9 divides the sum of all the digits evenly. What is Jack's social security number? Penny Nom lui répond. 





Social security numbers 
20020906 

Chris pose la question : How many different number combinations are there for the social security system? We know that there are only a certain ammount of combinations available and the current US population is at 281 million. The number system should include as many nine digit combinations as possible using the numbers 09 in multiple different spots. Penny Nom lui répond. 





Social Security Numbers 
19980707 

Valerie Lucas pose la question : How many social security numbers are possible? the answer is 10^9 why isn't the answer 9^9? Harley Weston lui répond. 

