Back to [Numbers 120-129]

 

[Math.]  1232 = 15,129 = (–1–5+129)2.

  

[Math.]

1×9+2 = 11          

12×9+3 = 111      

123×9+4 = 1,111

1234×9+5 = 11,111

12,345×9+6 = 111,111

123,456×9+7 = 1,111,111

1,234,567×9+8 = 11,111,111

12,345,678×9+9 = 111,111,111 

123,456,789×9+10 = 1,111,111,111

1,234,567,900×9+11 = 11,111,111,111

...

 

[Math.]

 1×8+1 = 9

12×8+2 = 98

123×8+3 = 987

1234×8+4 = 9876

12,345×8+5 = 98,765

123,456×8+6 = 987,654

1,234,567×8+7 = 9,876,543

12,345,678×8+8 = 98,765,432

123,456,789×8+9 = 987,654,321

1,234,567,890×8+90 = 9,876,543,210

      (start of a new cycle)

12,345,678,901×8+901 = 98,765,432,109

123,456,789,012×8+9,002 = 987,654,321,098

1,234,567,890,123×8+90,003 = 9,876,543,210,987

12,345,678,901,234×8+900,004 = 98,765,432,109,876

123,456,789,012,345×8+9,000,005 = 987,654,321,098,765

1,234,567,890,123,456×8+90,000,006 = 9,876,543,210,987,654

12,345,678,901,234,567×8+900,000,007 = 98,765,432,109,876,543

123,456,789,012,345,678×8+9,000,000,008 = 987,654,321,098,765,432

1,234,567,890,123,456,789×8+90000000009 = 9,876,543,210,987,654,321

12,345,678,901,234,567,890×8+ 900000000090 = 98,765,432,109,876,543,210

... (end of cycle) ...

 

[Math.] The 10th Lucas number.

 

[Movie]  Name of movie/series/TV show: “The Taking of Pelham 1 2 3”.

 

[Phone] The emergency telephone number dialing within Columbia.

 

[Trivia]  As easy or as simple as 1-2-3.

 

120-129

[Library]  Numbers 100-199 are the first 3 digits in Dewey Decimal Classification System call numbers for library books in Philosophy, Psychology and Ethics… Numbers 120-129 are for books in Epistemology and Humankind. 

 

120 (separate page)      

 

121 (separate page)      

 

123 (separate page)