In Panel I of the figure below, the front view and top view of a structure are shown. Which one of the 3D structures shown in Panel II possesses the views shown in Panel I?

To determine which 3D structure in Panel II corresponds to the views shown in Panel I, we need to analyze both the front and top views provided.
Now, analyze each option in Panel II:
Based on the analysis above, the correct 3D structure that corresponds to the views in Panel I is found to be option (iv). The views align perfectly with the stated shapes and perspectives from both views.
Therefore, the correct answer is (iv).
Three different views of a dice are shown in the figure below.

The piece of paper that can be folded to make this dice is
An opaque cylinder (shown below) is suspended in the path of a parallel beam of light, such that its shadow is cast on a screen oriented perpendicular to the direction of the light beam. The cylinder can be reoriented in any direction within the light beam. Under these conditions, which one of the shadows P, Q, R, and S is NOT possible?
Five cubes of identical size and another smaller cube are assembled as shown in Figure A. If viewed from direction X, the planar image of the assembly appears as Figure B. 
If viewed from direction Y, the planar image of the assembly (Figure A) will appear as
A palindrome is a word that reads the same forwards and backwards. In a game of words, a player has the following two plates painted with letters.

From the additional plates given in the options, which one of the combinations of additional plates would allow the player to construct a five-letter palindrome. The player should use all the five plates exactly once. The plates can be rotated in their plane.