Study the given pattern carefully and select the number that can replace the question mark (?) in it.
23 63 34
31 ? 28
27 63 18
Select the correct mirror image of the given combination when the mirror is placed at PQ as shown.
The sequence of folding a piece of paper and the manner in which the folded paper has been cut is shown in the following figures. How would this paper look when unfolded? 
Three different positions of the same dice are shown. Select the number that will be on the face opposite to the one having '1'.