Question 1025192: 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? Found 2 solutions by Alan3354, ikleyn:Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
There aren't many prime numbers from 1 to 100.
List them, see which ones fit. Answer by ikleyn(52787) (Show Source): You can put this solution on YOUR website! .
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.