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With only two numbers it is difficult to find a pattern but I would imagine that this is a simple one since those are the only two numbers provided. If you do 21-13=8 you see that the difference is 8 so therefore, you would add 8 to each continuing number of the sequence.
The pattern would be 13, 21, 29, 37, 45, 53, 61, 69
What else can I help you with?
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What is the next number in the series 13 18 16 21 19?
24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.
The next number in the series 13 1816 21 19?
24
What number comes next 4 13 19 21 29?
35
Which number is next in series 1-1-2-3-5-8-13?
21
Find the next number in the series 1 3 7 13 21 31?
43
Related Questions
What is the next number this pattern 1123581321?
If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34
What comes next 1123581321..?
The next number will be 13+21 = 34
What is the next number in this series 6 13 18?
21
What are the next number in the pattern 1235813?
If you mean: 1 2 3 5 8 13 then the next number is 8+13 = 21
Which number comes next 1 - 1 - 2 - 3 - 5 - 8 - 13?
the next number is 21 because it is adding the last number stated.
What is the next number in the series 13 18 16 21 19?
24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.
The next number in the series 13 1816 21 19?
24
Which number should come next in the series 8 13 21 26 31?
the answer will be 21
The next number in the series 13 18 16 21 19 is?
24
Choose the next number in the sequence 5 8 13 21?
34
What number comes next 4 13 19 21 29?
35
Which number is next in series 1-1-2-3-5-8-13?
21
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