Thursday, February 7, 2013

Magical properties of cube numbers


Magical properties of cube numbers.

There are many hidden properties among cube numbers.Few are described below.

Different ways of expressing n3 

43 = 42 x 4 + 4x02  = 16 x 4 +0

    = [42  - 1x4](4+1) + 4 x 12 = 12 x 5 + 4 x 1

  =[ 42- 2x4](4+2) + 4 x 22  = 8 x 6 + 4 x 4

= [42- 3 x4](4+3) + 4 x 32  = 4 x 7 + 4 x 9

For 53

53 = 25 x 5 + 0

    = 20 x 6 + 5 x 1

= 15 x 7 + 5 x 4

= 10 x 8 + 5 x 9

= 5 x 9 + 5 x 16

13 = 1

23 = 1 +(1+6)= 1+7 = 8

33= 1 +(1+6) +(1+6+12)= 1+7+19= 27

43 = 1+(1+6)+(1+6+12)+(1+6+12+18)= 1+7+19+37 =64

53= 1+(1+6)+(1+6+12)+(1+6+12+18)+(1+6+12+18+24)= 1+7+19+37+61= 125

13 = 02(6) +1

23 = 12(6)+2

33= 22(6) +3

43 = (12 +32) 6 + 4

53 = (22 + 42 ) 6 + 5

63 = (12 +32 +52) 6 +6

73 = (22+42+62) 6 + 7

83 = (12+32+52+72) 6 +8

93 = (22+42+62+ 82 )6 +9

103 = (12 +32 +52 +72 + 92) 6 + 10

In general  a3 = [ 12 +32 + 52 + ……. (a-l)2] 6 + a if a is even

                        = [ 22 + 42 + 62 +    (a-1)2] 6 + a if a is odd

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