Question

the l. c. m of 12,15,21 is​

Answer 1

$\huge\bold \red{question}$

$What \: is \: the \: L.C.M \\ of \: 12 , 15 \: and \: 21❓$

$L.C.M \: of \: 12, \: 15 \\ and \: 21 \: is \: 420$

Step by step explanation:-

Using prime factorisation method

12 = 2 × 2 × 3

15 = 3 × 5

21 = 3 × 7

Hence –

L.C.M = 2 × 2 × 3 × 5 × 7

⠀⠀⠀⠀= 420