Question

1. Find the Fib (10)​

Answer 1

Answer:

the tenth Fibonacci number is FIB (10) = 55. The sum of its digits is 5+5 or 10 and that is also the index number of 55 (10- th in the list of Fibonacci numbers) . so the index number of FIB is ( 10) is equal to it's digit sum ..

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