Three of the numbers given are greater than ten.


3   __
Ö11
 
 = Ö9×   __
Ö11
 
 =
Ö
 
9 ×11
 
 =   __
Ö99
 

Similarly
4Ö7 =   ___
Ö112
 

;


5Ö5 =   ___
Ö125
 

;


6Ö3 =   ___
Ö108
 

;


7Ö2 =   __
Ö98
 

.

Hence 4Ö7, 5Ö5 and 6Ö3 are all greater than 10.