Question 1025192
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How many prime numbers less than 100 be written using the digits 1,2,3,4,5 if no digit is used more than once? A digit may be used twice?
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1. Use this table of prime numbers to answer first question:
   https://primes.utm.edu/lists/small/1000.txt


2. To answer the second question, note that only one sucn number exists. It is 11. 
   Others are multiples of 11.
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