Question 390691
<pre>
Try Laura being 1. 
Then Amy is 4. 
The product of their ages is 4
The sum of their ages is 5. 
4 is not 2 times 5

Try Laura being 2. 
Then Amy is 5. 
The product of their ages is 10
The sum of their ages is 7. 
10 is not 2 times 7

Try Laura being 3. 
Then Amy is 6. 
The product of their ages is 18
The sum of their ages is 9. 
Hooray! 18 is 2 times 9

That wasn't too tedious.

Edwin</pre>