1,2,6,42,1806, What is the sixth number in the sequence ?

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!

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

Cap, your right. It could have been any numbers. So there's the explanation

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Originally Posted by colbtech

Cap, your right. It could have been any numbers. So theres the explanation

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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.

Understood.

Just read your 1st answer and understand it now! Doh!

Letter sequence ___ fpo , inm, mlk, rji

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Originally Posted by maryhong

letter sequence ___ fpo , inm, mlk, rji

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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.