Question

find the first four common multiples for 5,10,15 and also their LCM

Answer 1

Answer:

So LCM of 5,10,15and 2

5=5×1

10=2×5

15=3×5

2=2×1

Write common no. That is 5 which is in 5,10,and 15.

Another ine is 2 that is in 2and10

Multiply first two of them and then remaining

i.e, 5×2×3 (where 3 is only remaining of all of them.

LCM of 5,10,15,and2 =5×2×3=30(ans)

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Answer 2

Answer:

5= 1,5

10=1,2,5,10

15=1,3,5,15

the lcm of 5,10,15=30