`(19)^(12)xx(19)^8-:(19)^4=(19)^?` `6` b. `8` c. `12` d. `24`

(19)^(12)xx(19)^(8)-:(19)^(4)=(19)^(?)6b.8c.12d24

(12xx19)+(13xx8)=(15xx4)+?

(17) xx (-12) + (19) xx (-12) = …….

Evaluate: (i) .^(12)C_(1)+.^(12)C_(2)+.^(12)C_(3)+ . . .+.^(12)C_(12) (ii) .^(19)C_(3)+.^(19)C_(5)+.^(19)C_(7)+ . . .+^(19)C_(19) .

The projections of a line segment on X, Y and Z axes are 12,4 and 3 respectively. The length and direction cosines of the line segment are a. 13; (12)/(13),4/(13),3/(13) b. 19 ;(12)/(19),4/(19),9/(19) c. 11;(12)/(11),(14)/(11),3/(12) d. none of these

The value of tan(cos^(-1)(3/5)+tan^(-1)(1/4)) is (a) (19)/8 (b) 8/(19) (c) (19)/(12) (d) 3/4

151 xx 8 + (228 div 19)^(2)=?

{(1/3)^(-3)-(1/2)^(-3)}-:(1/4)^(-3) = (a) (19)/(64) (b) (64)/(19) (c) (27)/(16) (d) (-19)/(64)

The value of charge on the oil droplets experimentally observed were -1.6 xx 10^(-19), - 2.4 xx 10^(-19) and - 4xx10^(-19) C. The value of electronic charge, indicated by these results is (1) -1.6 xx 10^(-19) (2) -2.4 xx 10^(-19) (3) -4 xx 10^(-19) (4) - 0.8 xx 10^(-19)