The least number of five digits which is exactly divisible by 12,15 and 18 is :  Answers:  A) 10010  B) 10015  C) 10020  D) 10080  E) None of these
Solution   Least number of 5 digits is 10000. L.C.M. of 12, 15 and 18 is 180.   On dividing 1000 by 180, the remainder is 100.   ∴ Required number = 10000 + (180 - 100)= 
<gadget id="calculator">10000 + (180 - 100)</gadget>
<output>10_080</output>
10080. Answer 10080
<result>D</result>
The least number of five digits which is exactly divisible by 12,15 and 18 is :