How many natural numbers are there from 2 to 20. what fraction of them are prime numbers
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Solution. The natural number from 2 to 20 are 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20. there are 19 natural numbers. Prime numbers are 2,3,5,7,11,13,17,19.
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19 natural no.
prime no. 2,3,5,7,11,13,17,19
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