KitchenWitch
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Thu Oct-06-05 08:50 PM
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Name the first 10 prime numbers without googling |
ZombieNixon
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Thu Oct-06-05 08:52 PM
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1. 1, 2, 3, 5, 7, 11, 13, 17, 19, 23 |
Rabrrrrrr
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Thu Oct-06-05 08:53 PM
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ZombieNixon
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Thu Oct-06-05 08:54 PM
Response to Reply #7 |
11. Fine. Scratch 1, add 29 |
Arkana
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Thu Oct-06-05 08:52 PM
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2. 2, 3, 5, 7, 11, 13, 17, 19, 23, 29. |
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Edited on Thu Oct-06-05 08:53 PM by Arkana
I think that's right... EDIT: Missed 19.
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Rabrrrrrr
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Thu Oct-06-05 08:53 PM
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KitchenWitch
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Thu Oct-06-05 08:54 PM
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I caught you before the edit with 27 (but you fixed it)
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Arkana
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Thu Oct-06-05 08:57 PM
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I was hoping no one would notice--I realized it a split second after the 1st edit. :P
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CaliforniaPeggy
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Thu Oct-06-05 08:52 PM
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3. Oh well, I'm no damn good at this stuff....... |
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You can just give me the "F" now, and get it over with!
:rofl: :rofl:
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KitchenWitch
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Thu Oct-06-05 08:53 PM
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Qibing Zero
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Thu Oct-06-05 08:52 PM
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4. 1, 2, 3, 5, 7, 11, 13, 17, 19, 23 |
Rabrrrrrr
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Thu Oct-06-05 08:52 PM
Response to Original message |
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Edited on Thu Oct-06-05 08:53 PM by Rabrrrrrr
2, 3, 5, 7, 11, 13, 17, 19, 23, 29
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SW FL Dem
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Thu Oct-06-05 08:54 PM
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CaliforniaPeggy
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Thu Oct-06-05 08:54 PM
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10. Damn, there are so many right answers....... |
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Except for ME....... :cry:
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KitchenWitch
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Thu Oct-06-05 08:55 PM
Response to Reply #10 |
13. Your strengths are in other areas! |
Rabrrrrrr
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Thu Oct-06-05 08:56 PM
Response to Reply #13 |
14. Yes, but math strength is the only one that really matters |
CaliforniaPeggy
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Thu Oct-06-05 08:58 PM
Response to Reply #13 |
16. Ah, my dear KW........ |
NorthernSpy
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Fri Oct-07-05 04:30 AM
Response to Original message |
17. a trick for uncovering prime numbers: |
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First, write down a series of numbers, starting with the number 1.
Round One: Cross out the number 1.
Round Two: Mark the number 2. 2 is the smallest prime number. Now, starting at 2, cross out every second number. This eliminates multiples of 2.
Round Three: Mark the number 3. 3 is the first non-crossed-out number that you come to after Round Two, and is the next prime number. Now, starting at three, cross out every third number in the number sequence you wrote. This eliminates multiples of 3.
Round Four: Mark the number 5. 5 is the first non-crossed-out number you come to after Round Three, and is the next prime number. Now, starting at 5, cross out every fifth number. This eliminates multiples of 5.
Round Five: Mark the number 7, and cross out multiples of 7 as you did with the other numbers.
And so on.
It's called the Sieve of Eratosthenes.
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Kenneth ken
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Fri Oct-07-05 04:47 AM
Response to Reply #17 |
18. why is 1 not a prime number? |
NorthernSpy
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Fri Oct-07-05 04:57 AM
Response to Reply #18 |
19. one is not a prime number, because... |
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... a prime number is defined as a number that is the product of neither more nor less than two factors. 1 is its own sole factor.
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Kenneth ken
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Fri Oct-07-05 05:06 AM
Response to Reply #19 |
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thanks.
I really need to dig out a maths book; I'm only vaguely remembering "product" and "factor" - but don't tell me. If I don't remember these terms, I need to go relearn them.
:hi:
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tjwmason
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Fri Oct-07-05 05:31 AM
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21. For a moment I was impressed there |
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I thought it read prime ministers (I need to get showered and coffeed) - which would be impressive.
Sir Robert Walpole is commonly regarded as the first, but I can't go on from there.
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hyphenate
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Fri Oct-07-05 06:42 AM
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without looking at other peoples' answers, let's see how close I can come.
1, 3, 5, 7, 11, 13, 17, 19, 23, 29
Those are the first 10 I think. How close am I?
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LynneSin
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Fri Oct-07-05 06:43 AM
Response to Original message |
23. 2,3,5,7,11,17,19,23,29,31,37 |
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