`3/4(1+1/3)(1+2/3)(1-2/5)(1+6/7)(1-(12)/(13))=?` `1/5` (b) `1/6` (c) `1/7` (d) None of these

5(1)/(3)-3(2)/(3)-:1(1)/(3)-:?+3(1)/(5)-:1(1)/(5)=7(a)1(1)/(2)(b)2(1)/(3)(c)3(1)/(4)(d) None of these

(7(1)/(2)-5(3)/(4))/(3(1)/(2)+?)-:((1)/(2)+1(1)/(4))/(1(1)/(5)+3(1)/(2))=0.6 a) 4(1)/(3)(b)4(1)/(2) (c) 4(2)/(3) (d) None of these

5(1)/(4)+6(2)/(3)+7(1)/(6)=?

The value of tan[cos^(-1)((4)/(5))+tan^(-1)((2)/(3))] is (6)/(17) (b) (7)/(16) (c) (16)/(7) (d) none of these

2(1)/(7) + 3(6)/(7) + 5(1)/(6) = ?

(5)/(6)-:(6)/(7)xx?-(8)/(9)-:1(3)/(5)+(3)/(4)xx3(1)/(3)=2(7)/(9)(7)/(6)(b)(6)/(7)(c)1(d) None of these

2(1.5)/(5)+2(1)/(6)-1(3.5)/(15)=(((?)^(1/3))/(4))+1(7)/(30) (a) 2(b)8(c)512(d)324(e) None of these

(3)/(8) is what part of (1)/(12)?(3)/(7)(b)(1)/(12) (c) (4)/(3) (d) None of these

The value of (1)/(6)+(1)/(12)+(1)/(20)+...(1)/(90) is (A) (1)/(5) (B) (2)/(5)(C)(3)/(5) (D) None of these

(1)/((2(1)/(3)))+(1)/((1(3)/(4))) is equal to (a) (7)/(14) (b) (12)/(49) (c) 4(1)/(12) (d) None of these