If r = 2^4 * 5^2 * 7 and s = 2^2 * 3^2 * 5, which of the following is equal to the greatest common divisor of r and s? Options.
A) 2 * 5  B) 2^2 * 5  C) 2^3 * 5^2  D) 2*3*5*7  E) 2^3 * 3^2 * 5^2 * 7
GCD = product of prime factors raised to the least power = 2^2 * 5   The answer is 2^2 * 5.
<result>B</result>
If r = 2^4 * 5^2 * 7 and s = 2^2 * 3^2 * 5, which of the following is equal to the greatest common divisor of r and s?