Number systems (Real numbers)

to find that number 1st we have to find L.C.M. of 8,15 and 21 and that is 840.

 

now if we divide 110000 by 840 the remainder is 800 so subtract 800 from 110000 which gives 109200.  This is the final answer as its nearest number to 110000 which can be divided by 8,15 and 21