Make up a piece of JJ

Having taken 2 days break, try to find a piece of confidence, whatever, Study , review and prepare to write the test again next month. Benefited from Math JJ, I have no excuse to keep silent. There are some:

1.2^K is one of factor of the product from 1 to 20 (Inclusive) , Ask for the maximum of K ?  (18)
2.A flower arrangement A have 3 red , x White flowers;  a flower arrangement B have 5 red, 3 white flowers, ask for X: - D
(1)IF a flower draw from each arrangement , the probability of two flowers are both red is 1/6;
(2)IF a flower draw from each arrangement , the probability of two flowers are both white is 9/32;
3.Question about the maximum of height of that train. (7.5)
4.Some absolute. Median and mean math questions.

The types of the other questions is similar with old JJ, but the real is not JJ, be careful. I just met 3-4 JJ. However, it is not difficult but you need very careful.

About RC, the 4 articles I met are included in our old JJ, but these didn’t help me. Hope those will good for you. In my view, the articles are easy to understand but questions are very confused. That is why we can see our Reading JJ seems very “detail” like a GMAT articles but ……… I think we need used the whole sense when you are reading and quickly lock the place from which you can get you answer.
RC I met: 1. how did the U.S slaves save themselves?
      2. Supermarket: Small basket/ big basket; temperate discount/
         frequently discount strategy.
      3. About Dinosaur is warm blood or cold blood.
4. Forget, sorry.

I agree the SC is very important, and sounds like mid-level test question. Anyway, GOOD LUCK for you all. Willing hear from you, any piece of experience. Thanks!