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Given below is a finite sequence of numbers with an unknown x : 0, 1, 1, 2, 3, 5, 8, 13, x, 34, The value of x is
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- 21
- 20
- 19
- 17
- 21
Correct Option: A
In the given sequence, (starting from the third number) the succeeding number is sum of two just preceding numbers. i.e.,
1 = 0 + 1
2 = 1 + 1
3 = 1 + 2
5 = 2 + 3
13 = 5 + 8
x = 8 + 13
∴ x = 21
