Brain Teasers
13, 21, 34, 55, 89, X
Series
Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.Series
13, 21, 34, 55, 89, X
What is X?
What is X?
Hint
FibonacciAnswer
144Based on the Fibonacci sequence, where a number is the sum of the two numbers before it.
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