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Chronological Order
Number sequences are sets of numbers that follow a pattern or a rule. If the rule is to add or subtract a number each time, it is called an arithmetic sequence. In mathematics, a sequence is an enumerated collection of objects in which repetitions are allowed and order matters. Like a set, it contains members (also called elements, or terms).
idk but i was going to ask that one. The next number in ther sequence is.... 45 ! The difference between each number increases by three each time (3-0=3, 9-3=6, 18-9=9, 30-18=12 therefore 45-30=15) !
Oh, isn't that a lovely sequence of numbers? Let's see here, it seems like each number is increasing by a larger amount each time. If we look closely, we can see that the differences between the numbers are 5, 12, 22, and 35. So, the next logical number would be 120, as it follows the pattern of increasing differences.
it depends on the other number you are dealing with most of the time it is 5 but don't take that as an answer like i said it matters on the other number your dealing with