What is the greatest number of three digits which is divisible by 10, 20, 30 ? Choose the correct answer:
A) 960 B) 970 C) 980 D) 990 E) 965
Greatest number of 3 digits = 999   LCM of 10,20,30 = 60   999 ÷ 60= 16, remainder = 39   Hence, greatest number of four digits which is divisible by 10,20,30   = 999 - 39= 
<gadget id="calculator">999 - 39</gadget>
<output>960</output>
960   answer : 960
<result>A</result>
What is the greatest number of three digits which is divisible by 10, 20, 30 ?