Select the option that is related to the third number in the same way as the second number is related to the first number and the sixth number is related to the fifth number. 3 : 18 :: 9 : ? :: 5 : 100

500 236 648 435

648

Pattern followed is : X : X3 - X2 3 : 18  = 33 - 32 = 27 - 9 = 18 & 5 : 100  = 53 - 52 = 125 - 25 = 100 Similarly , 9 : ?  = 93 - 92 = 729 - 81 = 648 648 , is correct answer .