Question

Lcm of 21,27 and 30 give fastly

Answer 1

1890 is right.
please do not ask

Answer 2

$hey \\ here \: is \: your \: answer \\ \\ 21 = 3 \times 7 \\ 27 = 3 \times 9 \\ 30 = 2 \times 3 \times 5 \\ \\ here \: 2 \times 3 \times 5 \times 7 \times 9 = 1890 \\ \\ thanks$