... primes must end in 1 , 3, 7, or 9. (..., and if the sum is divisible by... the only other prime less than √ 100 = 10, that's all you have left to eliminate, because any...already stricken from the list), because any...

3 Answers · Science & Mathematics · 04/10/2012

...0 for any b in the range

**1 to 100**, so this case doesn't work...3 + y^3 must be a positive**prime**. 2) If a is**prime**then a^2 -**1**= 3b, so (a -**1**)(a +**1**) = 3b... primes except 3. So the**sum**of all a =**sum**of all primes ...2 Answers · Science & Mathematics · 20/07/2013

...you can take away

**100**and four ...and 19 -- for a**sum**of 50 -- say,**1**+ 3 + 7 + 11...you were**to**take away the digit "**1**"**from**each of the**numbers**11, 13, 15, 17...the first**prime**summand." "...2 Answers · Science & Mathematics · 27/03/2010

...this choice is different

**from**others. You...that most people say that the**prime**nos. less than**1**lakh (or**100**thousand) whose digital**sum**is 2 are 11...have tried extensively**to**find them and check...4 Answers · Science & Mathematics · 09/10/2006

...

**1**factors (**1**, p, p^2, ..., p^n...90) = 5, F(**100**) = 5, F(120.... 4)**From**#2, p^4 has...t think of any way**to**express 11 as the**sum**of three distinct primes .) I hope this...1 Answers · Science & Mathematics · 21/08/2012

...have students make a table listing the

**numbers from 1 to 100**in Column**1**. In Column... Column 3, have them find the**sum**of the factors (without including the...5 Answers · Science & Mathematics · 24/12/2012

...primesum

**to**itself**to**keep the previous**sum**(s). So, primesum... each time a**prime**number ...primecount = primecount +**1**(or primecount++). ...**sum**of all the**prime numbers**between**1**-**100**and the number...1 Answers · Education & Reference · 20/05/2007

... your code

**from**above, fixed the... 17 as a**sum**with 10 as the input...as expected.**To**test for edge cases...;<**prime**(i) <...21 : 77 22 : 77 23 :**100**24 :**100**25 :**100**26...2 Answers · Computers & Internet · 05/11/2014

...two sets of

**numbers**containing**numbers from 1 to**9 (**1**,2,3,4....9) then you can**sum**their squares up**to**get the form of a...90 3^2 + 9^2 33 97 4^2 + 9^2 34 98 7^2 + 7^2 35**100**6^2 + 8^22 Answers · Science & Mathematics · 21/02/2011

...have no reason

**to**expect the next...of the form 6k -**1**or 6k +**1**, then...**from**the roots...39;s for which**100**^2n -**100**^n +**1**...of being**prime**are those.... such**numbers**are way...would be 0.8 * (**sum 1**/k) where k...6 Answers · Science & Mathematics · 27/11/2011