the sum of the digits of all positive primes less than 20 is

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1 Answer

primes gotta be nonzero, positiv, integers

first fyu primes...2, 3, 5, 7,11, 13, 17,19

sum av digits=2+3+5+7+1+1+1+3+1+7+1+9

2+3+5+7=17

add in 5 1's...17+5=22

add in 3+7+9=19...22+19=41
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