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What is the least integer that is a sum of three different primes each
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21 May 2017, 11:26
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What is the least integer that is a sum of three different primes each greater than 20 ?
(A) 69
(B) 73
(C) 75
(D) 79
(E) 83
(A) 69
(B) 73
(C) 75
(D) 79
(E) 83
What is the least integer that is a sum of three different primes each
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21 May 2017, 11:28
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carcass wrote:
What is the least integer that is a sum of three different primes each greater than 20 ?
(A) 69
(B) 73
(C) 75
(D) 79
(E) 83
(A) 69
(B) 73
(C) 75
(D) 79
(E) 83
A Prime number is a positive integer with exactly two distinct natural number divisors: 1 and itself.
Primes greater than 20 are 23, 29, 31, 37, ...
The least integer that is a sum of three different primes each greater than 20 is thus 23 + 29 + 31 = 83.
Answer: E.
Similar question to practice: https://gmatclub.com/forum/what-is-the- ... 19839.html
Re: What is the least integer that is a sum of three different primes each
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12 Apr 2019, 05:29
Is there a more efficient method than listing primes, adding them, and matching it to the answer choices?