Question

find the largest no of 4 digits exactly divisible by 12,15,18,27.

Answer 1

@apoorvk

Answer 2

Okay. so, find out the LCM of these nos. first of all.
Now any no. that's divisible by all 4 of these nos., would be a multiple of that.
So, find out the largest 4 digit multiple of the LCM!

Answer 3

i got de lcm as54...den hw 2 do it??

Answer 4

Now which multiple of 54 is the largest 4 digit multiple possible? Find that by trial and error.

54 is a wee bit greater than 50, (and I know 50 times 200 is 10000, but I need a no. smaller than that).

So, I check for 54 times 198, which is 9972, and is a 4 digit no.
Now just confirming if this is the largest, I check for 19, but 54 times 19 = 10026, which is 5-digits. Hence, N/A.


So, 54 times 18 it is, i.e. 9972!

Answer 5

but how about 15.
9972/15=664.8!

Answer 6

That means your LCM was wrong. It is wrong in fact @prasannalakshmi :/
And i foolishly didn't even check *facepalm*

Answer 7

oopz it was 540 infact

Answer 8

the answer is 540*18 = 9720

Answer 9

my english is not good, i wish my explain can help you.
among 12, 15, 18, 27
the least number has the integer multiple of these is 540=3*3*3*4*5
and use the lesat 5 digits number 10000 devide it
the answer would be 18.5......
so use the integer 18 times 540 which is 9720

Answer 10

got it? :)

Answer 11

ya:)

Answer 12

thnq gyzz

Answer 13

i dont understand your short write -.-

Answer 14

thnq = thank you
gyzzz = guys

don't go by the spelling, *feel* the pronunciation :P

Answer 15

ya. it would be helpful to me to learn english!