Question

lcm of 15 ,10,20,30​

Answer 1

Answer:

60.

Step-by-step explanation:

Answer 2

Answer:

60

Step-by-step explanation:

First, write out the prime factorization of each number

10=2×5

15=3×5

20=2²×5

30=2×3×5

We can rewrite the above with more clarity as

10=2¹×3×5¹

15=2×3¹×5¹

20=2²×3×5¹

30=2¹×3¹×5¹

For each prime factor, take the one with the highest exponent. 2 is raised to the power of 2 in 20. 3 and 5 have both a maximum exponent of 1.

Therefore,

LCM=2²×3¹×5¹ = 60