Exam Maths Puzzle Permutation and Combination

If a person is standing in room, that is having mirrors in all the four walls. How many images of the person will appear.

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Exam Other Question

a cube of 3 units is painted on all sides.If this cube is divided into cubes of 1 unit,how many cube have none of their faces painted?
(a) ...
(b) 2
(c) 1
(d) 0
(e) None of these
Perform the indicated operation
1. (4 + 3m + m^2) + (m^2 + 6m + 5)
2. (x + 5) (x^2 + 2x + 10)
3. (3a + 1)^2