Saturday, 8 October 2011

Interesting Facts ----> 40 - Multiplication of two digit squares

This is an interesting way to find squares of two digit numbers - Need to test it for all combinations though but works for quite a few of them so far whatever I have tested :)

57
57
---
2549 (5*5 = 25, 7*7 = 49)
  70    (5+5) * 7 or (7+7) * 5 ----> Note the way 70 is written below the first line
-----
3249
-----

68
68
----
3684
  96
-----
4624
-----

46
46
----
1636
  48
------
2116
------

97
97
-----
8149
126 -------------> Notice how 126 is written due to the extra digit
-----
9409
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