Calculate the L.C.M of 1/5, 6/ 7, 5/6, 3/5 is : Choose the correct choice from the following choices:	A) 15	B) 30	C) 20	D) 40	E) 10
Required L.C.M =L.C.M. of 1, 6, 5, 3/H.C.F. of 5, 7, 6, 5 =30/1= 
<gadget id="calculator">30/1</gadget>
<output>30</output>
30   Answer is 30
<result>B</result>
Calculate the L.C.M of 1/5, 6/ 7, 5/6, 3/5 is :