It depends on (a) the first five numbers of what and
(b) what sort of sequence.
ANY 5 numbers can be put into a quartic sequence. So the answer is: every time.
The missing number is 5. They're the first five prime numbers.
The first five whole numbers are: 01234. The first five natural numbers are: 12345.
Assuming that you can use each number multiple times, 3125, because there are five options for the first number, five for the second, and so on to reach five. Then, five times five times five times five times five, or five to the fifth power, equals 3125. Were you only able to use each number once, the answer would be 120 based on the same principle. There would be five options for the first number, four remaining options for the second, three for the third, two for the fourth, and then one for the fifth. Then, as with the first, five times four times three times two (times one, but that really isn't necessary) results in 120.
Two possible answers spring immediately to mind. First, this sequence appears to be a list of the first five prime numbers; in this case, the next number in the sequence would be 13. Second, the intervals between these numbers comprise the sequence "1 2 2 4", in which the nth number equals the product of the (n-1)th and (n-2)th numbers. Based on this, the next number in the given sequence would be 11 + (4*2) = 19.
The sequence "tttffss" represents the first letters of the numbers one through eight: one, two, three, four, five, six, seven. The next number in the sequence is eight, which starts with the letter "e." Therefore, the next letter in the sequence is "e."
The mode is the number that shows up the most in a sequence of numbers. Ex. 5,3,2,8,9,10,10,4,5,5. Since five show up the most( 3 TIMES) THEN THIS MAKES IT THE MODE
The sum of the first five whole numbers is 10.
10946
The first five prime numbers are 2, 3, 5, 7, 11. The sum of these five numbers is 28.
The first five abundant numbers are 12, 18, 20, 24, and 30.
Assuming the first five numbers is meant to refer, not to the first five real numbers but to the first five positive integers, the answer is 1*2*3*4*5 = 120
2,1,0 is th sequence of its terms