The LCM is 84
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No None of the numbers that divide into 12 also go into 49 Only 7 goes into 49 In 12 there are 2 or 3 or 4 or 6 that can divide
They are: 3 and 7
Oh, what a lovely question! To find the average of those numbers, you simply add them all together and then divide by how many numbers there are. So, for 6, 7, and 8, you would add them (6 + 7 + 8 = 21) and then divide by 3 (since there are 3 numbers), giving you an average of 7.
1/7 x 12/9 = 12/63 = 4/21
add all the numbers up and count how many numbers there are then divide it2+3+5+7=17 count the numbers. 4 17 divide by 4 = 4.25