♥PROFILE

3e4's
 Liqing, Jonathan, Zi An, Wesley's group

♥DESIRE

WISH ONE; Mr Bi give high marks
WISH TWO;Dont need, want him give high marks can already T^T
WISH THREE;


♥TALKS


♥MEMORIES


•January 2010
•February 2010
•July 2010


♥MUSIC

Music: ♬ Cannon


MusicPlaylist
Music Playlist at MixPod.com


♥CREDITS

Designer : SIMIN
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♥Picture upload :PHOTOBUCKET
♥Coding :MINMIN
♥Image: 1

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Sunday, July 25, 2010
Q1
170-31=139
tan0=139/400
=19.16
tan19.16=0/2480
861.8=0
861.8+920+120=1401.8
~ 1402

Q2
(1402-420)/(180+130)=3
ans= 3rd storey

Q3
90-19.16=70.8 degree

Q4
ans: 19.16

Smile always | 2:03 PM

Sunday, February 21, 2010



Smile always | 7:57 AM


VERSION 1!










Smile always | 7:32 AM

Thursday, February 18, 2010


VERSION 2!!!

Weigh coins 1 2 3 on the left and 4 5 6 on the right. Leave 7 and 8 at one side first.
Since the counterfeit coin is lighter, the weighing scale on either side will go up.

If the one on the left goes up, either of coins 1 2 3 is the counterfeit coin.
weigh coin 1 on the left and coin 2 on the right.
If it balances, it means that coin 3 is the counterfeit coin.
If one of the side goes up, the one that goes up is the counterfeit coin.

If the weighing scale balance, it means that either of coin 7 or 8 is the counterfeit coin.
weigh coin 7 and 8 on each side, the one that goes up is the counterfeit coin.




Smile always | 8:48 PM


Task: There are 3 versions of the counterfeit coin problem, each with increasing degree if difficulty. You are to solve each problem using any heuristics. Most importantily, list the thinking skills you have used to solve the problems.

Version one:

OO OO OO OO

You are given 8 coins. Of the 8 coins, one of them is a counterfeit coin which is lighter than the other coins. You are provided with a balance weighing scale. Using the balance weighing scale at most twice, explain the steps which you would take to identify the counterfeit coin.



Version 2:

OOO OOO OOO

Now, you are given 9 coins and 1 of them is a counterfeit coin. The counterfeit coin is heavier than the good coins. Explain how you would find the counterfeit coin using the balance weighing scale in only 2 weighings.



Version 3:

OOO OOO OOO OOO

Now, you are given 12 coins and 1 of them is a counterfeit coin. The counterfeit coin may be heavier or lighter than the good coin. Explain how you would find the counterfeit coin using the balance weighing scale in only 4 weighings.

Smile always | 8:00 PM

Thursday, January 28, 2010


welcome.welcome.welcome.welcome.welcome.welcome.welcome.

Smile always | 6:27 AM