Find the value of   `sqrt( 58 + sqrt ( 31 + sqrt ( 21 + sqrt ( 11 + sqrt( 25 ) )`
( A ) 7
( B ) 8
( C ) 9
( D ) 6

Find the value of   sqrt( -25 ) times sqrt( -9 )

Find the value of sqrt(11.981+7sqrt(1.2996))

Find the value of sqrt 10+sqrt 25+sqrt 108+sqrt 169

Evaluate : ( sqrt(7) + sqrt(2) ) times ( sqrt(3) + sqrt(8) )

Find the value of a and b . (sqrt11 - sqrt7 ) / (sqrt 11 + sqrt 7) = a - b sqrt 77 (i) a = 9/2 , b = 1/2 (ii) a = 2/9, b = 2/3 (iii) a = 2/5, b = 1/2 (iv) a = 9/2, b =5/2