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Question

For  what  value of  `**` the statement `(**/15) (**/135)`   = 1   is true ?


Options:
A .  15
B .  25
C .  35
D .  45
Answer: Option D

Let the missing number be  `x`.

Then `x^2` =  15 x 135   `hArr`    `x`  =   `sqrt(15 xx 135)`   =   `sqrt(15^2 xx 3^2)`  =   15 x 3 = 45



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