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 ?

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`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
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Comments

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

Chew-Seong Cheong - 5 years, 11 months ago

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

Akshat Sharda - 5 years, 11 months ago

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

Chew-Seong Cheong - 5 years, 11 months ago

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

Coincidental numbers appear everywhere!

Daniel Liu - 5 years, 11 months ago

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

imagine incredible maths

Guneet Singh Oberai - 5 years, 11 months ago

$Wow!!$

Akshat Sharda - 5 years, 11 months ago

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

Ryan Ken Lelis - 5 years, 11 months ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$