I DONT GET IT; IT SAYS WHICH OF THE FOLLOWING PAIRS OF NUMBERS HAVE A LEAST COMMON MULTIPLE OF 56......
THESE ARE THE PAIRS:
2 AND 28
7 AND 8
4 AND 14
3 AND 17
HELP MEEEE
2 answers
https://www.mathsisfun.com/least-common-multiple.html
Review how to find Least Common Multiple
e.g. 4 and 14
4 = 2*2
14 = 2*7
so I need 2*2*7 = 28
for 7 and 8
7 = 1*7 , 7 is prime
8 = 2*2*2
so we need 1*7*2*2*2 = 56
here is another example, using 3 numbers
find the LCM of 12, 20, and 45
12 = 2*2*3
20 = 2*2*5
45 = 3*3*5
so we need 2*2*3*3*5 = 180
e.g. 4 and 14
4 = 2*2
14 = 2*7
so I need 2*2*7 = 28
for 7 and 8
7 = 1*7 , 7 is prime
8 = 2*2*2
so we need 1*7*2*2*2 = 56
here is another example, using 3 numbers
find the LCM of 12, 20, and 45
12 = 2*2*3
20 = 2*2*5
45 = 3*3*5
so we need 2*2*3*3*5 = 180
10 answers