perplexus.info :: Just Math : Function Function Function Function Foray

Function Function Function Function Foray (Posted on 2015-03-31)

N is a positive integer and F(N) denotes the sum of the base ten digits of N.

Find F(F(F(2²⁰¹⁶))) and F(F(F(F(2²⁰¹⁶))))

*** As an extra challenge, solve the puzzle without using a computer program assisted method.

See The Solution Submitted by K Sengupta

Rating: 5.0000 (1 votes)

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
computer solution to both parts; analytic solution for part 2	Charlie	2015-03-31 14:43:39
A good guess / computer help	Jer	2015-03-31 12:50:47

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