answer for this quation is just simple only add two digit like 8+13=21 next will 13+21=34 ok.................
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This is the Fibonacci Series, where each term is the sum of the previous two. It continues 21, 34, 55 etc
The series appears to increase as follows: 1 (+3), 4 (+5), 9 (+7), 16,, etc. If so, the next number in the series would be 25 (16 + 9). * * * * * While mathematically equivalent, a simpler description is: 12, 22, 32, 42, 52 ...
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