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The subcomponent we refer to as mental rotation comprises the ability to imagine the rotation of two- (2D) and three-dimensional (3D) objects. Geometrical objects are often identified in varying positions and that can require rotating them mentally. 2D tasks or figures are often displayed as geometrical figures, such as the letter z or the number 2, in varying positions either rotated or rotated and mirrored, which requires us to visualize them and compare them mentally. It is the part of spatial ability, where we generally have to rotate simple 2D or 3D objects mentally, and then compare the results with given objects. In this chapter, we present 12 problems encompassing 24 tasks, which largely address the subcomponent mental rotation.