What is the smallest positive perfect square that is divisible by 4, 10, and 18?  Choose the correct choice from the following answers
A) 900  B) 1,600  C) 2,500  D) 3,600  E) 4,900
The number needs to be divisible by 2^2, 2*5, and 2*3^2.   The smallest such perfect square is 2^2*3^2*5^2 = 900   The answer is 900.
<result>A</result>
What is the smallest positive perfect square that is divisible by 4, 10, and 18?