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What is the smallest positive multiple of 13 for which the sum of its digits is prime?
Wiki User
∙ 14y ago
Start with the smallest multiple of 13 and continue with the next smallest until finding one that fits the specifications.
13, sum of digits is 1 + 3 = 4 which is not prime
26, sum of digits is 2 + 6 = 8 which is not prime
39, sum of digits is 3 + 9 = 12 which is not prime
52, sum of digits is 5 + 2 = 7 which is prime
So, 52 is the smallest positive multiple of 13 for which the sum of its digits is prime.
Wiki User
∙ 14y ago
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What is the smallest two-digits prime number whose digits are also prime themselves?
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Smallest is 11 & Largest is 77.
What is the smallest two-digits prime number whose digits are also prime themselves?
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What is the smallest five digits prime number?
It is: 10007
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