Qassam Posts: 2, Reputation: 1 New Member #1 Jan 21, 2009, 05:35 AM
Find the sequence?
1,2,6,42,1806, What is the sixth number in the sequence ?
 Capuchin Posts: 5,255, Reputation: 656 Uber Member #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 Posts: 746, Reputation: 65 Senior Member #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 Posts: 746, Reputation: 65 Senior Member #4 Jan 21, 2009, 06:54 AM
Cap, your right. It could have been any numbers. So there's the explanation
 Capuchin Posts: 5,255, Reputation: 656 Uber Member #5 Jan 21, 2009, 07:03 AM
Originally Posted by colbtech
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 Posts: 746, Reputation: 65 Senior Member #6 Jan 21, 2009, 07:11 AM

Understood.

 maryhong Posts: 1, Reputation: 1 New Member #7 Mar 25, 2012, 11:56 PM
Letter sequence ___ fpo , inm, mlk, rji
 ebaines Posts: 12,132, Reputation: 1307 Expert #8 Mar 26, 2012, 05:54 AM
Originally Posted by maryhong
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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