Question

which is the smallest 4 digit no.divisble by 12,15,18​

Answer 1

Step-by-step explanation:

The smallest four digit number divisible by (each of) 12, 15, and 18 is divisible by their least common denominator, 180 .

(12 = 2^2 * 3 ;

18 = 2 * 3^2 ;

20 = 2^2 * 5 ;

so LCM = 2^2 * 3^2 * 5 .)

1000 is the smallest 4-digit number.

1000 / 180 is a little over 5 :

5 * 180 = 900 < 1000

6 * 180 = 1080 > 1000 .

So 1080 is the required four digit number.

Answer 2

Answer:

180

Step-by-step explanation:

because we take H.C.F of 12,15,18