Question

3. Find the LCM of 3kg and 400g (b) 980 (c) 850 (d) 950 (a) 840​

Answer 1

$1kg = 1000g \: \\ 3kg = 3000g \: \\ \\ lcm \: of \: 3000 \: and \: 400 \\ \\ 2| 400 | 3000 \\ - - - - - - \\ 2| 200 | 1500 \\ - - - - - - \\ 2| 100 | 750 \\ - - - - - - \\ 2 | 50 | 375 \\ - - - - - - \\ 5 | 25 | 375 \\ - - - - - - \\ 5 | 5 | 75 \\ - - - - - - \\ 5| 1 | 15 \\ - - - - - - \\ 3 | 1| 3 \\ - - - - - - \\ \: \: \: \: \: \: 1| 1 \\ \\ lcm \: = \: 2 \times 2 \times 2 \times 2 \times 3 \times 5 \times 5 \times 5 \\ lcm \: = 16 \times 3 \times 125 \\ lcm \: = 48 \times 125 \\ lcm \: = 6000$