A 31" x 31" square metal plate needs to be fixed by a carpenter on to a wooden board. The carpenter uses nails all along the edges of the square such that there are 32 nails on each side of the square. Each nail is at the same distance from the neighboring nails. How many nails does the carpenter use?
Hint: Consider a nail at the corner of each square.
he places them an inch apart, first nail is at 0 second at inch 1 etc. Am I right?
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