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# Primes numbers are scary

Do you know that the sum of digits of first $$100$$ $$prime$$ $$numbers$$ is $$1111$$.

Can anyone tell me how to calculate that ?

Note by Akshat Sharda
2 years, 8 months ago

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You can write a program to calculate it. I used Python and it is as follows. Note that p is a list of at least the first 100 primes.

p = [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,127,131,

s = ''
for i in range(100):
s += str(p[i])

sum = 0
for j in range(len(s)):
sum += int(s[j])

print sum

- 2 years, 8 months ago

Sir , is there any other way to do it ? I don't know about Python or something like that.

- 2 years, 8 months ago

I don't think so or else we can predict the occurrence of primes, which we can't.

- 2 years, 8 months ago

Do you know that- 1 +12+123+1234......+123456789+9+98+987.......+987654321= 1234567890.........

imagine incredible maths

- 2 years, 8 months ago

$$Wow!!$$

- 2 years, 8 months ago

Curiously enough, the number of triangles in a straight-edge $$K_6$$ graph is $$111$$. (See here)

Coincidental numbers appear everywhere!

- 2 years, 8 months ago

I think you can use the Arithmetic Series . search it :D

- 2 years, 8 months ago