35 + 125 = 17.88

35 + 25 x 5 = 17.88

35 + 55 = 17.88

85 = 17.88

5 = 2.235

80 + 65 = 16 x 5 + 65

   = 45 + 65

   = 105 = (10 x 2.235) = 22.35

   1|1.5625( 1.25
    |1
    |-------
  22| 56
    | 44
    |-------
 245| 1225
    | 1225
    |-------
    |    X
    |-------     

1.5625 = 1.25.

L.C.M. of 21, 36, 66 = 2772.

Now, 2772 = 2 x 2 x 3 x 3 x 7 x 11

To make it a perfect square, it must be multiplied by 7 x 11.

So, required number = 2² x 3² x 7² x 11² = 213444

Then x² = 128 x 162

   = 64 x 2 x 18 x 9

   = 8² x 6² x 3²

   = 8 x 6 x 3

   = 144.

x = 144 = 12.

(.000216)1/3	=		216		1/3
			106

=		6 x 6 x 6		1/3
		102 x 102 x 102

   = 0.06