Q: What is the next number 0 3 9 21?

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28

It is 21 + 34 = 55

The next number in the sequence 3-15-6-30-21 is -207.

39. The rule here is starting with the number 9, add (-6 + sequence number * 6). 9 + (-6) = 3 3 + 0 = 3 3 + 6 = 9 9 + 12 = 21 21 + 18 = 39 39 + 24 = 63

63

21: (3)+3=(6)+4=(10)+5=(15)+6=(21)

If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34

The next number is -21

7203

102

24 is.

0 9-3=6 6-3=3 3-3=0

Looks Fibonacci, but you are missing the first 0... 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, etc. where each number is the sum of the preceeding two.

If the last number is 1/3 (it should be), the next number is 5 and 1/3

43. Alternatively add and subtract, doubling the amount each time, starting with 1: 0 + 1 = 1 1 - 2 = -1 -1 + 4 = 3 3 - 8 = -5 -5 + 16 = 11 11 - 32 = -21 So add 64 for the next term: -21 + 64 = 43 (The next term would then be subtract 128: 43 - 128 = -85)

The next number is 4, followed by -2

The next number in the sequence is 48.

The next number in the pattern is 48. This pattern adds multiples of three to the existing number. 3 + (3 x 0) = 3 3 + (3 x 1) = 6 6 + (3 x 2) = 12 12 + (3 x 3) = 21 21 + (3 x 4) = 33 33 + (3 x 5) = 48 etc.

The answer is 21.Your numerical series is the beginning of a mathematical sequence called Fibonacci Numbers.The first number of the sequence is 0, the second number is 1, and each subsequent number is equal to the sum of the previous two numbers of the sequence itself (i.e. 0, 1, 1, 2, 3, 5, 8, 13, 21, etc.).

The sequence indicates that one number is added to the previous number to find the value of the next number. Example 1 (+0) - 1 (+1) - 2 (+1) - 3 (+2) - 5 (+3) - 8 (+5) - 13. The next number in the sequence would be 21 (13 + 8).

If you mean: 1 2 3 5 8 13 then the next number is 8+13 = 21

33

Using the position-to-value rule Un = (17n4 - 190n3 + 721n2 - 1064n + 540)/4 the next number is 276.

24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.

2+3=53+5=85+8=1313+21=3333 is the next number in this pattern. This pattern is called a Fibonacci.

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