composite no

Find the smallest composite, which is not divisible by first five prime numbers.


The answer is 169.

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1 solution

Ankit Wasti
Oct 10, 2018

let x be the required no. as 11 is the fifth prime the prime factors of x must be>11. so the smallest possible factor of x is 13. so smallest possible value of x=13*13

The answer should be 4, because it is divisible by one of the first 5 prime numbers.

Blan Morrison - 2 years, 8 months ago

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not divisible by any first 5 prime numbers.

Ankit Wasti - 2 years, 8 months ago

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You said "no not," which is a double negative. You need to get rid of the "no."

Blan Morrison - 2 years, 8 months ago

I just did the same procedure but totally forgot that I could square 13. Instead, I did 13*17. This was a good question.

Abha Vishwakarma - 2 years, 8 months ago

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