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  1. 25 - I don't know of a mathematical way to figure it out. ref: http://learning.mgccc.cc.ms.us/pk/mathdocs/devmath/primefact.htm 39 = 3 * 13 51 = 3 * 17 57 = 3 * 19 69 = 3 * 23 89 = 3 * 29

    7 Answers · Science & Mathematics · 26/06/2007

  2. You pair them off: 1 +99 = 100 2 + 98 = 100 3 + 97 = 100 ... 48+52 = 100 49 + 51 = 100 That's 49...http://en.wikipedia.org/wiki/Arithmetic_series#Sum_.28arithmetic_series.29 1 + 2 + ... + n = n(n+ 1 ) / 2

    7 Answers · Science & Mathematics · 01/08/2007

  3. ...;< "Would you like to play again? y or n: "; cin >> answer...; endl; } while (num >= 1 && num <= 100 && answer == 'y'); system("PAUSE...

    3 Answers · Computers & Internet · 24/10/2011

  4. ... any number: ");//enter 100 scanf("%d", &num); printf("\...n++)   {    if(n ==2)      p= 1 ;    for(div=2; div<n...0; } If you copy and paste remember to edit out white spaces needed...

    2 Answers · Education & Reference · 20/02/2013

  5. The sum of any 'n' numbers from 1 to 'n' is n(n + 1 )/2. Thus if n = 100 , the sum will be 100 * 101 / 2 = 5050.

    8 Answers · Science & Mathematics · 24/03/2008

  6. ...can add to 100 to get to 100 is 0, and 0 is not included in 1 to 100 .

    2 Answers · Science & Mathematics · 26/09/2007

  7. ... 20 XX 40 XL 60 LX 80 LXXX 100 C

    4 Answers · Education & Reference · 09/12/2012

  8. ...main(String arg[]) { int s=0; System.out.print("Even Numbers are"); for(int i= 1 ;i<= 100 ;i++) { if(i%2==0) { System.out.println(i); } } System.out.println...

    2 Answers · Computers & Internet · 18/12/2008

  9. ... prime itself. Fine I give up its kinda hard to explain so here. 1 2 3 5 7 11 13 17 19 OH JUST FIGURE IT...

    11 Answers · Education & Reference · 20/04/2008

  10. ...there are a total of 100 *2 = 200 digits. Thus, each digit 0 to 9 comprises 10... in that range of numbers . This pattern ... that for 1 to 100000, you have one more...

    4 Answers · Science & Mathematics · 17/04/2007

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