Showing posts with label number arrangements. Show all posts
Showing posts with label number arrangements. Show all posts

Tuesday, September 8, 2009

FUN WITH NUMBERS



M
athematics, too, has arrangements
that could be called palindromes.
For example:

21978 x 4 = 87912
10989 x 9 = 98901

There are more complex examples of reversal,
mixing addition and multiplication.
For example:

9 + 9 = 18 ..... 81 = 9 x 9
24 + 3 = 27 ..... 72 = 3 x 24
47 + 2 = 49 ..... 94 = 2 x 47
497 + 2 = 499 ..... 994 = 2 x 497