Question

THE LEAST COMMON MULTIPLE [ LCM ] OF THREE NUMBERS - 15,30,45 IS THE SAME AS THE

A. LCM of 15 and 30
B. LCM of 15 and 45
C. LCM of 30 and 45
D. [ It cannot be the same as the LCM of any 2 of the 3 given numbers. ]

Answer 1

correct option is option B

Answer 2

Answer:

Option (c) :LCM of 30 and 45 .

Step-by-step explanation:

Least common multiple of numbers means the smallest common multiple of the numbers which is divisible by the given numbers.

To know the Least Common multiple of the three numbers 15,30,45, first we have to know the multiples of these numbers.

Multiples of 15: 15, 30, 45, 60, 75, 90..

Multiples of 30: 30, 60, 90, 120..

Multiples of 45: 45, 90, 135...

We can see that 90 is the multiple of these three numbers which is common in these three numbers..

So the 1st Common multiple of 15,30,45 is 90.

Least Common multiple of 30 and 45 is also 90.

So, The Least Common multiple of the three numbers 15,30,45 is same as LCM of 30 and 45 .