Major brain F*RT!! Please help!!!!

It's a pretty sad day when you can't help your 6th grader in math!
Heck, this actually started in 4th grade!
Does anyone have ANY idea what the mystery number is?? Math is not one of my strong points! :imbar Actually, I'm doing well if I can add fractions!
Here it is:
Mystery Number!
"I am a very popular number. In addition to being the least common multiple of 15, 18 and 20:
I am 20 times larger than the square of 3;
If you use a protractor to measure me as an angle, I form a semicircle.
Who am I?"
:confused" Help???
Thanks! 
Aug 29, '02I believe the answer is 180.
180 can be divided by 15  12 times, by 18  10 times and by 20  9 times.
The square of 3 is 9 and multiplied by 20 is 180.
A semicircle is 180 degrees.Last edit by Rusty59 on Aug 29, '02 


Aug 29, '02Okay, just figured 3x3=9....9x20=180...right?
Half circle is 180 degrees??
I knew it would be something right in my face!!:imbar
Thanks!
Oops! We must have been posting at the same time! Thanks for getting my brain working...well, it's not really working, but I do like to pretend sometimes!Last edit by OHmom2boys on Aug 29, '02 
Aug 29, '02oh yeah, I can see my son using that! NOT!
Why are they starting this stuff in the 6th grade?? It's insane!
I HATE homework! It's not like I don't have enough of my own! LOL!
Thanks! 


Aug 29, '02Hey, I'm gonna blow 'em away in my algebra class I start next week, huh?
Lord, I need help. What a total idiot!! 
Aug 29, '02Woot!!! For once I **KNEW** the math answer! Thanks! I needed that! As soon as you said, semicircle I knew it! I am SOOO proud of myself. (I never get these things right either! Hubby has to do the math homework with the kids....)

Aug 29, '02Ohio mom.......You're not a total idiot !!!
How many people would know how to do that problem?
I studied algebra and geometry and took chemistry two semesters in college, and then even conquered statistics !
But I didn't have a clue.....
Math is like a second language. If you don't use it everyday, you forget it. I know the math I use daily, all the other
stuff I knew once...... has vanished. If I study it for a few days, it comes back.........s....l...o...w...l...y...
who needs it? as Rusty said........in the real world ?? 
Aug 29, '02my youngest son is taking prealgebra this year, i'm hoping that i can remember how to help him.. ugh !! let's see x+y =a+b:a+b=m+n:x+y=m+n, oh sure that makes sense.. lol
i agree... it is a second language ! 