michellejiang9p51b45
michellejiang9p51b45 michellejiang9p51b45
  • 03-07-2018
  • Mathematics
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How many positive integers less than 20 have exactly two positive divisors

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konrad509
konrad509 konrad509
  • 03-07-2018
All primes - 2,3,5,7,11,13,17,19 (8 in total)
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