abdulazizalmaw880 abdulazizalmaw880
  • 04-03-2018
  • Mathematics
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How many numbers less than 1000 are divisible by 7?

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alicuhh
alicuhh alicuhh
  • 07-03-2018
==> The number of positive integers divisible by 7 but not by 11 is 142 - 12 = 130. ==>the number of positive integers less than 1000 that are divisible by either 7 or 11is 142 + 90 - 12 = 220. ==>the number of positive integers less than 1000 that are divisible by exactly by one of 7 and 11 is 220 - 12 = 208.
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