Which is the greatest among `(5)^23, (25)^(11), (625)^6, and (3125)^5`?

Which is the greatest among (9)^6, (27)^5, (81)^4 , and (243)^2 ?

Which of the fraction is largest among (2)/( 5) , ( 5)/( 11), ( 8)/( 17), ( 11)/( 23) ?

The greatest fraction among (2)/(3),(5)/(6),(11)/(15) and (7)/(8)

Which is the greatest among (sqrt(19)-sqrt(17)),(sqrt(13)-sqrt(11)),(sqrt(7)-sqrt(5)) and (sqrt(5)-sqrt(3))?

Which is the greatest among (sqrt(19)-sqrt(17)),(sqrt(13)-sqrt(11)),(sqrt(7)-sqrt(5)) and (sqrt(5)-sqrt(3))?

(3125^(x)xx5^(9))/(625)=(125)^(-1)

Out of the fractions (9)/(31),(3)/(17),(6)/(23),(4)/(11) and (7)/(25) which is the largest? (9)/(31) (b) (3)/(17) (c) (6)/(23) (d) (4)/(11) (e) None of these