The lowest common multiple of 6, 15 and x is 150. Write down the least value of x.
The working solutions:
1) First do the LCM working...Thus the LCM is 2,3,5 and 1.
Then 6 = 2 * 3
15 = 5*3
Least value of x = 5^2 =25
I don't understand about the last part...Why they have to use 5^2 to get 25? In the LCM working, there is only 1 five...So, how and why they mulitply the 5 twice to get 25? I don't understand....Please help..You could also explain the question in your own method
2007-09-19 20:09:20 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
150 = 2 * 3 * 5^2
5^2 has to come from x because neither 6 nor 15 provide it.
2007-09-19 20:26:22 · answer #1 · answered by Anonymous · 0⤊ 0⤋
LCM of 6 and 15 is 30 .
to get 150 as LCM u need another 5 .so the least no. is 25 as it is 5^2
u got ny more dbts try the trial and error method
2007-09-20 03:24:42 · answer #2 · answered by SAT 2 · 0⤊ 0⤋
150 factors into 2*3*5*5
6 = 2*3
15 = 3*5
but you need two 5's, so the smallest value of x is 5*5 = 5^2 = 25
2007-09-20 03:28:58 · answer #3 · answered by Helmut 7 · 0⤊ 0⤋