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    Qassam's Avatar
    Qassam Posts: 2, Reputation: 1
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    #1

    Jan 21, 2009, 05:35 AM
    Find the sequence?
    1,2,6,42,1806, What is the sixth number in the sequence ?
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #2

    Jan 21, 2009, 06:32 AM
    Try dividing each term by the previous term.

    Do you see the pattern? What is the sixth number?

    I have to admit, this is a bit of a tricky one!
    colbtech's Avatar
    colbtech Posts: 746, Reputation: 65
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    #3

    Jan 21, 2009, 06:46 AM
    1
    2 = previous number * (previous number + 1) 1*(1+1)
    6 = previous number * (previous number + 1) 2*(2+1)
    42 = previous number * (previous number + 1) 6*(6+1)
    1806 = previous number * (previous number + 1) 42*(42+1)


    3263442
    colbtech's Avatar
    colbtech Posts: 746, Reputation: 65
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    #4

    Jan 21, 2009, 06:54 AM
    Cap, your right. It could have been any numbers. So there's the explanation
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #5

    Jan 21, 2009, 07:03 AM
    Quote Originally Posted by colbtech View Post
    Cap, your right. It could have been any numbers. So theres the explanation
    I was more referring to you doing someone else's homework for them. People don't learn if you just give them the answers. And sometimes they don't even learn when you give them full working and the answers. Hence the rationale for the answer I gave.
    colbtech's Avatar
    colbtech Posts: 746, Reputation: 65
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    #6

    Jan 21, 2009, 07:11 AM

    Understood.

    Just read your 1st answer and understand it now! Doh!
    maryhong's Avatar
    maryhong Posts: 1, Reputation: 1
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    #7

    Mar 25, 2012, 11:56 PM
    Letter sequence ___ fpo , inm, mlk, rji
    ebaines's Avatar
    ebaines Posts: 12,132, Reputation: 1307
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    #8

    Mar 26, 2012, 05:54 AM
    Quote Originally Posted by maryhong View Post
    letter sequence ___ fpo , inm, mlk, rji
    Try this: for each letter replace it by the number representing its numeric place in the alphabet. For example 'f' is the 6th letter, 'p' is the 16th, and 'o' is the 15th, so the first entry 'fpo' corresponds to the sequence 6-16-15. You should see a pattern for the first numbers in each of your letter sequences, and also for the 2and 3rd.

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