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Is it, or is it not? (Posted on 2007-04-10) Difficulty: 4 of 5
Is (258+1)/5 an integer? A prime?

See The Solution Submitted by Federico Kereki    
Rating: 3.6667 (3 votes)

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Some Thoughts Just a simple pattern | Comment 9 of 12 |

Dear Charlie sir,

Thank you for reminding me of my mistake,i really appreciate your method but i would like to know how could you make out that numbers out of pattern are not prime.Is it only by look,or check,or through some computer programme.If by look only,then how,or how to check.I am extremly eager to know about this.kindly tell me


(in advance)

  Posted by Nishant on 2007-04-10 17:59:11
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