Math help?

Question

I need 2 know the least common multiples of
1.9,14,21
2.34,52
3. 36,82
4. 42,56,140
5.16,25,27

Whats the write answer for number 4 all of u had a diffrent answer?

Answer 1

1)126

2)884

3)1476

4)448

5)10800

Answer 2

Method:
Break all numbers down into their prime factorizations. i.e. 6 = 2 x 3, 60 = 2 x 2 x 3 x 5
Take all the numbers they don't have in common and multiply them together to the numbers they do have in common (be sure to not double count) i.e. 8 = 2 x 2 x 2, 10 = 2 x 5. They do not have 2 x 2 and 5 in common. This equals 20 which when multiplied by the 2 that they share, is 40.

1. 126
2. 884
3. 1476
4. 1680
5. 10800

Answer 3

Do you mean "lowest common multiples" ie lcm?
If so:
1) none
2) 2
3) 2
4) 7 and 2
5) none

Answer 4

http://en.wikipedia.org/wiki/Least_common_multiple

For example, number 2:

lcm (34,52) = (34 * 52) / gcd (34,52)

Just find the greatest common divisor and you're all set.

Answer 5

126
884
1476
840
10800

u r welcome