Answer 1

In the given figure, forces 10 N and 100 N act clockwise and the forces 15 N and 4 N act anticlockwise   

MOment of force = sum of clockwise moments - sum of anti clockwise moments

Moments of force = (10 x 5 + 100 x 0 + 4 x 6) - ( 15 x 4) = 74 - 60 = 14 Nm

or 14 Nm in clockwise direction.