Logic

A cube of edge 4cms is painted red externally. It is then cut into one cm cubes. How many of these do not have red paint on any face?

Three counters A, B and C are colored with three different colors red, blue and white. Of the following statements only one is true.
1. A is Red.
2. B is not Red.
3. C is not Blue.
What is the color of each counter?

Square papers of black and white are arranged as shown
There are totally 80 squares. The number of white squares is ________ .

Amith, Bharath, Chithra and Deepa are friends and one among them committed a crime. They made the following statements. If only one of the statements is true, find who was guilty.
Amith: Bharath did it.
Bharath: Deepa did it.
Chithra: I did not do it.
Deepa: Bharath lied when he said I did it.