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LCM= Lowest common multiple

And you're finding the factors of 12 and 4 to do this.

You can present this as the tree form.

Using that information you can answer the question.

4 - lowest factor (not including 1) is 2

12 -lowest factor (not including 1) is 2

Thats the LCM of those two.

Here's yet another way of looking at the problem:

.

The ratio of their ages is 3 : 6 : 8     and this  sums to 17

So......doubling each number produces a  sum of 34...and that's between 30 and 50........so we have...

6 : 12 : 16  .....and Mina is 12

(MG...these questions are all slightly different.......)

3 : 6  :  8

Naomi is 4/3 Mina's age.

And Mina is 2 times as old as Lev.

So Naomi is (4/3)(2) = 8/3 on Lev's age......so....

The ratio of Lev'as age to Naomi is  1 : 8/3  =  3 : 8

Melody: "It would have been nice if you had given us the jist of your logic anon :)"

I'll try to explain what I did; I'll use a clock (hour hand).

I set the centers of the circles (A and B) at 9:00 and 3:00, then I added 2 more centers (C and D) at 12:00 and 6:00. The circumferences of these circles have created 4 vertices of the square (W, X ,Y and Z) at 10:30, 1:30, 4:30 and 7:30. I drew the sides and the diagonals of the square, and marked the center of it with an (O).

If you draw an isoceles triangle (BDW), and mark a midpoint of (BD) with an (M), we get a perfect right triangle (BMW). 

BW = 10cm,   BO = 5cm,   BM = sin45^o*5 = 3.54cm,   BM = MO,   MW = 9.35cm,  OW = MW-MO = 5.82cm

The diagonal of the square:   2OW = 11.62cm

The side of the square:    WX = sin45^o*11.62 = 8.22cm

(And finally), the area of the square (WXYZ) is:    67.71cm². 

It would be nice if someone made a graph of all this; if you decided to do it, do not draw the whole circumferences; do them to the point where they cross each other; it's gonna look nicer. Thanks!

I'm  exhausted !!!

We gotta' have 6 guinea pigs to produce "round" numbers....this would mean 9  hamsters and 4 giant cloud rats....so N =  19

2.3 / .51  = about 4.5 inches....to the nearest tenth......

AWESOMEE got the all!

1. Be prepared

2. Always make sure you read the question right.

3. Study

4. Use your time wisely

5. Check your answers

You might think I'm a being a typical teacher but seriously! These are vital rules. 

Every times when I used to do tests i always missed out marks with daft answers on easy questions.

Don't be nervous, know you're gonna ace the test.

Read the question right seriously, so many times I've done that...

Study on the topic drill the notes into your head!

Don't spend too much time on a question come back to it later, otherwise by the time you get it times up. Use your time on the big mark questions.

The relates to 2. along with reading it check a double check is always safe!

study, logic, luck, magic, and a ruler for strait A's

7 x .51 miles =  3.57 miles

LOL.

Kinda sexist...

But we all know this isn't true. Look who runs the forum!!!

yup! XD  XD

Lol awesomee that was one logically funny joke! Lol!

if there would've been a man asking for cooking skills and some cleverness he would be turned into an old woman! Wouldn't he?

Gah, i don't pay enough attention. 

The second i saw  divide with 8 & 16 my first thought was one.

$$\\3+8\div16\times(8+5)\\\\
=3+8\div16\times\mathbf{(8+5)}\qquad(Parentheses)\\\\
=3+8\div16\times13\\\\
=3+8\div16\times13\qquad(There\;are\;no\;Exponents\;)\\\\
=3+8\div16\times13\\\\
=3+\mathbf{8\div16}\times13\qquad(Division)\\\\
=3+0.5\times13\\\\
=3+\mathbf{0.5\times13}\qquad(Multiplication)\\\\
=3+6.5\\\\
=\mathbf{3+6.5}\qquad(Addition)\\\\
=9.5$$

It was quick, because i copied and paste then edit. 

Haha, don't worry i understand that very well.

It's like you do the opposite to get the inverse.

1+2=3 

3-2=1

2*3=6

6/3=2

3^2=9

sqrt(9)=3

Now that I'm doing Square root, i have a question about it, when doing e.g. 5^5 

How do you do the inverse in sqrt on the calculator. 

4^2=16

sqrt(16)=4

But...

2^5=32

...(5)sqrt(32)???

What is 8 divided by 16 MG

3p - 7 > 11    add 7 to both sides

3p > 18         divide both sides by 3

p > 6

The perimeter is given by:

(3x+6) + (4x+8), + (5x+10)  = 

12x  + 24

I do use the copy & paste feature for latex. :)

$$\\3+8\div16\times(8+5)\\\\
=3+8\div16\times\mathbf{(8+5)}\qquad(Parentheses)\\\\
=3+8\div16\times13\\\\
=3+8\div16\times13\qquad(There\;are\;no\;Exponents\;)\\\\
=3+8\div16\times13\\\\
=3+\mathbf{8\div16}\times13\qquad(Division)\\\\
=3+2\times13\\\\
=3+\mathbf{2\times13}\qquad(Multiplication)\\\\
=3+26\\\\
=\mathbf{3+26}\qquad(Addition)\\\\
=29$$

I am not sure what the right word is

but yes they can be used to cancel each other out. 

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I'm not explaining this very well. :/

Everyone does it MG.  I think I do it more than most others.

I just think you need to on guard for this type of error the same as I do :)

Dyslexia. That's the first I've heard that.

I don't know whether it's true or not.

There is grammar check on this website. I use it a lot, sometimes a double a word or miss one out. It's because i plan what i write before writing it, so I miss out small words like "for" and "know" etc. Also letters.

(I searched the symptoms of it that's why I'm knowing this).

Also for the 15 and 51.

I mixed the 51 and 15 in my Latex but luckily i noticed it before i posted it.

The reason why I done this (i think) is because i worked on a question before it with 14/15 and this question was 14/51.

Oh, cool!