determine greatest 4 digit number which is divisible by 18, 24 and 32

Question

Should we do LCM or HCF ?

Answer 1

we are to use the LCM

the LCM is 864.Then we have to look for the greatest four digit multiple of 864.

This can be easily be got by dividing the last four digit(9999) number by 864 giving 11.57...,this means that the number is (864 x11).Thus the number is 9504.

 

Answer 2

first take the lcm then go on multiplying with multiple of lcm until you will get the highest number of 4 digit..