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Not true (Posted on 2014-07-17) Difficulty: 2 of 5
I've found (on the web) a short list of "SPECIAL FEATURES " of the number 197:

a. It is the only 3-digit Keith* number.
b. It is a sum of three cubes.
c. It is a difference of two squares.

One (and only one) of the above is not true.

Prove it.

  Submitted by Ady TZIDON    
No Rating
Solution: (Hide)
a. is not true.
742 is also a Keith number

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionSolutiontomarken2014-07-17 10:24:09
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