Pen : Write :: Knife : ______

Which one of the following options maintains a similar logical relation in the above?

Gauri said that she can play keyboard _______ her sister.

A jigsaw puzzle has 2 pieces. One of the pieces is shown above. Which one of the given option for the missing piece when assembled will form a rectangle? The piece can be moved. rotated or flipped to assemble with the above piece.

If $$\theta$$ is the angle, in degrees, between the longest diagonal of the cube and any one of the edges of the cube, then cos $$\theta$$ = _______