Problem 473. old wine in a new bottle?

Created by AMITAVA BISWAS

Solve Later

You have been given an apparently brand new unary function XXX,
that maps some ordinary scalars to scalars,
please guess if this XXX is 'new wine' or 'old wine',
that is functionally equivalent to an already built-in function,
such as sin cos sqrt log10 etc.,
for positive inputs between 0.2 to 0.8.

Solve

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167 Solutions
29 Solvers

Last Solution submitted on Dec 07, 2025

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Problem Comments

2 Comments

2 Comments

@bmtran (Bryant Tran) on 9 Mar 2012

test case 2 is incorrect. the given function will only return positive values, which means it is not equivalent to sin (and therefore new wine)

AMITAVA BISWAS on 9 Mar 2012

adding 'for positive inputs between 0.2 to 0.8'

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