`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

(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

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

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

(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

The sum of the series 1 + (1)/(3^(2)) + (1 *4)/(1*2) (1)/(3^(4))+( 1 * 4 * 7)/(1 *2*3)(1)/(3^(6)) + ..., is (a) ((3)/(2))^((1)/(3)) (b) ((5)/(4))^((1)/(3)) (c) ((3)/(2))^((1)/(6)) (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

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

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

(3.5xx1.4)/(0.7)=?( a) 0.7(b)2.4(c)3.5(d)7.1 (e) None of these