What is the smallest positive perfect square that is divisible by 12, 14, and 42?  Select:
A) 900
B) 1089
C) 1600
D) 1764
E) 2025
The number needs to be divisible by 2^2*3, 2*7, and 2*3*7.   The smallest such perfect square is 2^2*3^2*7^2 = 1764   The answer is 1764.
<result>D</result>
What is the smallest positive perfect square that is divisible by 12, 14, and 42?