it is 7
They are arrange alphabetically.
-1,-2,-3 10-1=9 9-2=7 7-3=4
This sequence of numbers is in alphabetical number when written in their full form, eg; "eight".
I'm guessing your sequence is 1, 3, 6, 10, 15, ... In which case it continues: 21, 28, 36, 45, 55, 66, ... (These are the triangular numbers.)
This is the sequence of numbers from 1 to 10, which, when written as English words, they would be in alphabetical order.
Up to the 10, (in English) they are in alphabetical order - Eight, Five, Four, ...
8 5 4 9 1 7 6 10 3 2 0 This sequence is special because the numbers are in alphabetical order. The Fibonacci sequence is very special and the triangular sequence.
it is 7
all no. between 0-10 that too in alphabetically sorted <a href="http://dailybrainteaser.blogspot.com/2011/04/sequence-number-puzzle-18april.html?otherblog=tutorvista">More Info</a>
They are arrange alphabetically.
there all in alphabetical order
-1,-2,-3 10-1=9 9-2=7 7-3=4
10 30 15 16 48 24 25 x3 1/2 +1 x3 1/2 +1
This sequence of numbers is in alphabetical number when written in their full form, eg; "eight".
I'm guessing your sequence is 1, 3, 6, 10, 15, ... In which case it continues: 21, 28, 36, 45, 55, 66, ... (These are the triangular numbers.)
add 5 / subtract 7 (the following numbers will include negatives: -1, 4, -3, 2, -5. 0)