81.
If $$\sqrt 6 = 2.449{\text{,}}$$   then the value of $$\frac{{3\sqrt 2 }}{{2\sqrt 3 }}$$   is = ?

82.
If $$\sqrt 5 = 2.236{\text{,}}$$   then the value of $$\frac{{\sqrt 5 }}{2} \, - $$  $$\frac{{10}}{{\sqrt 5 }} \, + $$  $$\sqrt {125} $$  is equal to = ?

83.
If $${\text{ }}2*3 = \sqrt {13} $$   and 3 * 4 = 5, then the value of 5 * 12 is ?

84.
The least perfect square number divisible by 3, 4, 5, 6 and 8 is = ?

85.
The least number by which 294 must be multiplied to make it a perfect square, is = ?

86.
What is the least number which should be subtracted 0.000326 in order to make it a perfect square = ?

87.
What is the least number to be added to 7700 to make it a perfect square ?

88.
The smallest number to be added to 680621 to make the sum a perfect square is = ?

89.
The greatest four digit perfect square number is = ?

90.
The least number of 4 digits which is a perfect square is = ?

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