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PYHIYP #1 (Posted on 2019-12-09) Difficulty: 2 of 5
PYHIYP means: Put your hands in your pockets i.e. use no calculators, no pen & paper; just your eyes and you brain.

The 1st task, a harbinger to be followed by many others, is to prove just by observation and common sense that none of the four numbers listed below is a prime.

i. 5,234,567,896,743
ii. 1,438,525,775,258,341
iii. 77,112,356,378,491
iv. 1,431,436,216,211,339

No time limit!
No cheating!
KISS!
Post your conclusions.

No Solution Yet Submitted by Ady TZIDON    
Rating: 5.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionAnswersMath Man2019-12-21 20:09:02
SolutionSpoiler for ivSteve Herman2019-12-10 14:57:46
Spoiler for iii.Jer2019-12-10 09:27:13
Spoiler (i and ii)Steve Herman2019-12-10 08:29:23
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