The greatest number of four digits which is divisible by 10, 20, 40 and 60 is:	Select:	A) 9200	B) 9300	C) 9400	D) 9600	E) 9700
Greatest number of 4-digits is 9999.   L.C.M. of 10, 20, 40 and 60 is 600.   On dividing 9999 by 600, the remainder is 399.   Required number  (9999 - 399)= 
<gadget id="calculator"> (9999 - 399)</gadget>
<output>9_600</output>
9600.   ANSWER :9600
<result>D</result>
The greatest number of four digits which is divisible by 10, 20, 40 and 60 is: