Find each of the following products :
(i) 35×−78 (ii) −92×54 (iii) −611×−53
(iv) −23×67 (v) −125×10−3 (vi) 25−9×3−10
(vii) 5−18×−920 (viii) −1315×−2526 (ix) 16−21×145
(x) −76×24 (xi) 724×(−48) (xii) −135×(−10)
(−7)+(−9)+12+(−16)=?(a) −20(b) 20(c) −12(d) none of these