My son had this prelim paper and one of the qns was this:

Rong Qi set up an experiment as shown below.
(Ok, no pic, but discription. You see a test tube. The pic is vague, but I will try.

__Stopper__

__Seeds___
_Moist cotton wool_


___________
Limewater

The whole thing is the tube. The stopper is at the mouth of the tube. A little lower is the seeds resting on top of Moist cotton wool. Then limewater fills the bottom.)
He left the test tube near a window in his classroom for one week.He observed that the limewater turned chalky.
a) Based on the results, what happened to the seeds?
b)Explain your answer in part (a).
c) His teacher commented that he needs a control setup. Draw the control setup.

My son came to me with this question and I am no good at science. :stupid: So could any kind soul help me? :?:

Thanks in advance,
24-hour Father

Dear mathsguru,

Sorry to trouble you, but my son had been recently given a math worksheet but he seems confused and cannot work this out. Even I, too, have problems as I have left primary school for too long. :stupid: The question is:

Adam and Rahmad shared some beads. If Adam gave one-third(1/3) of his share to Rahmad, Rahmad would have 70 more than Adam. If Adam gave one-fifth(1/5) of his share to Rahmad, Rahmad would have 10 more than Adam. How many beads does Adam have at first?

It drove my son up the wall and he had been thinking about this all weekend, so I decided to help but unfortunately, my mermory failed me. I hate to disappoint my son so I would like to have the answer by 13 Feb, not to be rude, but I am at wit's end. I hope I will be able to make my son's day by answering his question.

Anyways,
Thanks In Advance! :celebrate:
(I do hope someone can help me) :?:
P.S. Pardon my English.