Guest Posted August 8, 2009 Report Share Posted August 8, 2009 Hey its been a long time since i've been on, but i have some new riddles for you guys. Name the first 10 prime numbers Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 8, 2009 Report Share Posted August 8, 2009 1,2,3,5,7,11,13,17,19,23,27,29,31 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 8, 2009 Report Share Posted August 8, 2009 if 1 counts as a prime number. So i'll just say 2,3,5,7,11,13,17,19,23,29 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 8, 2009 Report Share Posted August 8, 2009 1,2,3,5,7,11,13,17,19,23,27,29,31 i agree with these except 27(9X3) Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 8, 2009 Report Share Posted August 8, 2009 (edited) 1 is not a prime number, by definition a prime number has 2 numbers by which they can be divided, 1 and themselves. number 1 can only be divided by 1, so it's not a prime number 2,3,5,7,11,13,17,19,23,29,31...'] Edited August 8, 2009 by alehanna Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 8, 2009 Report Share Posted August 8, 2009 2,3,5,7,11,13,17,19,23,29 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 8, 2009 Report Share Posted August 8, 2009 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, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 8, 2009 Report Share Posted August 8, 2009 (edited) 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 Edited August 8, 2009 by jyde2077 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 8, 2009 Report Share Posted August 8, 2009 (edited) 2 3 5 7 9 11 13 17 19 23 29 31 37 41 43 47 51 P.S: 1 is not a prime number, since prime numbers have exactly two divisors. 1 only has itself. Edited August 8, 2009 by skolnick Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 9, 2009 Report Share Posted August 9, 2009 2 3 5 7 9 11 13 17 19 23 29 31 37 41 43 47 51 P.S: 1 is not a prime number, since prime numbers have exactly two divisors. 1 only has itself. 51 is not prime..17x3=51 Quote Link to comment Share on other sites More sharing options...
0 plainglazed Posted August 9, 2009 Report Share Posted August 9, 2009 Their names are: Jane, Billy, Anna, Mickey, Beth, Ray, Maria, Tom, Dick, and Harry Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 9, 2009 Report Share Posted August 9, 2009 Ok I guess that one was kinda easy, just trying to see how many can get the first one Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 9, 2009 Report Share Posted August 9, 2009 3,5,7,11,13,17,19,23,29,31 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 9, 2009 Report Share Posted August 9, 2009 (edited) 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 Edited August 9, 2009 by arnel Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 9, 2009 Report Share Posted August 9, 2009 Ricky, Bobby, Freddy, Sally, Billy, Sammy, Joey, Jamie, Mary, and Sue Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 9, 2009 Report Share Posted August 9, 2009 And the first ten larger than an American billion are 1,000,000,007; 1,000,000,009; 1,000,000,021; 1,000,000,033; 1,000,000,087; 1,000,000,093; 1,000,000,097; 1,000,000,103; 1,000,000,123; 1,000,000,181. Thanks Mathematica ! It is interesting that the first two form a prime pair, i.e. n-1 and n+1 are both prime. To the best of my knowledge no-one has yet shown that there is an infinity of such pairs. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 9, 2009 Report Share Posted August 9, 2009 1, 2, 3, 5, 7, 11, 13, 17, 23, 29 and because I don't recall whether 1 is a prime or not, the next is 31 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 9, 2009 Report Share Posted August 9, 2009 And the first ten larger than an American billion are 1,000,000,007; 1,000,000,009; 1,000,000,021; 1,000,000,033; 1,000,000,087; 1,000,000,093; 1,000,000,097; 1,000,000,103; 1,000,000,123; 1,000,000,181. Thanks Mathematica ! It is interesting that the first two form a prime pair, i.e. n-1 and n+1 are both prime. To the best of my knowledge no-one has yet shown that there is an infinity of such pairs. I was not aware that Americans actually had their own unique billion. Does every country have one of their own? If so, is every country's billion somehow inversely proportional to the length of time it takes for that country to spend one of their billions? Wow! If that is indeed the case, I can surely be proud to know that, as an American, my billion is a lot larger than anyone else's billion. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 9, 2009 Report Share Posted August 9, 2009 I was not aware that Americans actually had their own unique billion. Does every country have one of their own? If so, is every country's billion somehow inversely proportional to the length of time it takes for that country to spend one of their billions? Wow! If that is indeed the case, I can surely be proud to know that, as an American, my billion is a lot larger than anyone else's billion. Yes a traditional billion is a million million or 1,000,000,000,000 which is also an American trillion. Anyway back on topic... Quote Link to comment Share on other sites More sharing options...
0 Guest Posted August 10, 2009 Report Share Posted August 10, 2009 Yes a traditional billion is a million million or 1,000,000,000,000 which is also an American trillion. Anyway back on topic... Traditionally, there was a perfectly valid word for 1,000,000,000 namely a "milliard." This was unknown to some American maths educators in the 19th Century (we use an "s" after the "math" in Britland) and the difference in the definition of a "billion" has now become permanent. Quote Link to comment Share on other sites More sharing options...
0 unreality Posted August 11, 2009 Report Share Posted August 11, 2009 I know that prime numbers are technically defined as 'positive' but -1 is arguably a prime. Its only factors are itself and 1. If you do allow negative numbers, -1 can be the ONLY such negative prime because any other negative prime number has itself and 1 along with -1 and its positive self Quote Link to comment Share on other sites More sharing options...
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Hey its been a long time since i've been on, but i have some new riddles for you guys.
Name the first 10 prime numbers
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