● No spam
● Correct explanation needed
● Need Statements also

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
The smallest number which is divisible by 12 , 15 and 30 is their L.C.M , that is :
LCM = 2 × 2 × 3 × 5 = 60
hence, the required number is 60
[tex]\mathrm{✌TeeNForeveR✌}[/tex]