The given figure in which unit cubes are put together to form a structure as shown:

The number of unit cubes in the given structure is
(a) 13
(b) 20
(c) 21
(d) 22
Solution:
The number of unit cubes to be added to make a cuboid of dimensions 4 unit × 4 unit × 2 unit is
(a) 11
(b) 12
(c) 13
(d) 14
Solution:
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