What mathematical operation should come at the place of ? in the equation: `2?6-12-:4+2=11` (a) + (b) `-` (c) `xx` (d) `-:`

What should come in place of * mark in the following equation? 1*5$4-:148=78( a) 1 (b) 4(c)6(d)8(e) None of these

What should come in place of question mark (?) in the following questions? ? = (45 xx 11) -: 3

What value should come in place of question mark (?) in the following question? 196 + 42 xx 11- 171 = ?

What should come in place of the question mark (?) in the following questions: 214 - (5)^2 xx 9 -: 15 = ?

What should come in place of question mark (?) in the following questions ? (762-9025-:19)^2=?xx2

What will come in place of question mark (?) in the following equation? ?^2 = (7 + 11) xx (19 + 13)

What should come in place of the question mark (?) in the following questions: (6)^2 xx (9)^2 -: (3)^2 = (?) xx 5

What should come in place of the question mark (?) in the following questions ? (5)/(6) + (8)/(9) xx (3)/(5) = ?

What should come in place of both the question marks in the equation (?)/(sqrt(128))=(sqrt(162))/(?). (a) 12 (b) 14 (c) 144 (d) 196

What will come in place of question mark (?) in the following equation? V(12 xx 4 - 12 + 28) = ?