Question

find the lcm of 15,20,21​

Answer 1

Answer:

420

Step-by-step explanation:

Multiples of 15:

15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375, 390, 405, 420, 435, 450

Multiples of 20:

20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300, 320, 340, 360, 380, 400, 420, 440, 460

Multiples of 21:

21, 42, 63, 84, 105, 126, 147, 168, 189, 210, 231, 252, 273, 294, 315, 336, 357, 378, 399, 420, 441, 462

Therefore,

LCM(15, 20, 21) = 420

Answer 2

Answer:

Step-by-step explanation:

The LCM of 15, 20 and 21 is 420.