The least perfect square number, exactly divisible by 21, 36 and 56 is?
Select the correct option.
A) 7056  B) 3600  C) 550  D) 440  E) 250
LCM = 7 * 3 * 4 * 3 * 2= 
<gadget id="calculator">7 * 3 * 4 * 3 * 2</gadget>
<output>504</output>
504   504 * 7 * 2= 
<gadget id="calculator">504 * 7 * 2</gadget>
<output>7_056</output>
7056   7056NSWER 7056
<result>A</result>
The least perfect square number, exactly divisible by 21, 36 and 56 is?