The value of `((3/5)^3-(2/5)^3)/((3/5)^2-(2/5)^2)` is `1/5` (b) `(19)/(25)` (c) `(21)/(25)` (d) `1`

2 3/5-:5/7=\ (a) (13)/7 (b) (13)/(25) (c) (91)/(25) (d) (25)/(91)

The value of (1 1/7-2/3+(2/5)/(1-1/(25)))/(1-1/7[1/3+(2/5)/(1-2/5)]) is (a) 3/4 (b) (24)/(25) (c) 1 (d) 1 1/(24)

The value of {2-3(2-3)^(3)}^(3) is 5(b)125(c)(1)/(5)(d)-125

The value of 1^(2)+3^(2)+5^(2)+...+25^(2) is (A) 1728(B)1456(C)2925(D) none

The value of {2-3(2-3)^3}^3 is (a)5 (b) 125 (c) 1/5 (d) -125

(1)/(5)+(1)/(2.5^(2))+(1)/(3.5^(3))+(1)/(4.5^(4))+.......=

If + is called X,"-" is called - ,X is called - and "-: is called "'+" ,then the value of 6+5-:5-3times6" is (A) "25(2)/(3) (B) " 17(2)/(3) (C) " 14(1)/(3)," (D) "15(2)/(3)

If 5a+ (1)/(3a) = 5 , then the value of 9a^(2)+(1)/(25a^(2)) is

(2/3)^(-5)x\ (5/7)^(-5) is equal to (a) (2/3x5/7)^(-10) (b) (2/3x5/7)^(-5) (c) (2/3x5/7)^(25) (d) (2/3x5/7)^(-25)

Find the value of (( 2^0 + 1)/ 5^0 ) is ( a ) 2 ( b ) 1 ( c ) ( 2/5 ) ( d ) ( 3/5 )