Bunuel wrote:

x! is defined for all whole numbers x as the product of all the positive integers from 1 to x inclusive (where 0!, considered an “empty product,” is defined as 1). For example, 5! = (1)(2)(3)(4)(5). Let two functions be defined over the set of whole numbers as follows:

f(x) = x!

g(x) = the product of all the digits of x.

What is f(g(111,111,114))?

A. 0

B. 1

C. 4

D. 24

E. 362,880

f(g(111,111,114))=f(1*1...(8times)*4)=f(4)=4!=(1)(2)(3)(4)=24

Ans.(D)

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Regards,

PKN

Rise above the storm, you will find the sunshine