Quant Boosters  Nitin Gupta  Set 2

Each angle is 180(p2)/p.
180{360}/{p} = k
So 360/p has to be an integer.
360 = 2^3 * 3^2 * 5^1
So there are 4 * 3 * 2 = 24 possibilities, but we exclude 1 and 2, because p > = 3
So , 24 2 = 22
Hence, choice (c) is the right answer