Random?

hiyas peepo :DD

wow. havent been on this blog for a super long time ._. glad to see that we're still "alive" :DDD time sure flies... it's gonna be the CT week soon ._. jiayous everyone :)

The one that loves kejuju

Puzzle 20

Hi!

I'm creating an archive for my puzzles, so you can see all the past puzzles! Hope you don't mind the extra sidebar content...

Anyway if it gets too long I'll try to minimize it.

Here's (the late) Puzzle 20!

LUCK AND PROBABILITY (PART 2)

Difficulty: Easy

Okay... I'll give you people a break since the previous puzzle was a "Very Hard" puzzle.

You are faced with 3 doors. One of them leads to the escape while the other 2 lead to a dead end. You are only allowed to open 1 door.

Suppose you pick one of the 3 doors. A door (which you didn't pick) that leads to a dead end is automatically opened for you. You are then allowed to switch your choice, to the other unopened door.

Should you change your mind? By how much does your chance of opening the wrong door change if you decided to switch doors?


Now for the answer to Puzzle 19...

1) It's surprisingly, 2/3, not 1/2!

There are only 3 faces which have circles on them: 2 of which are on the same card, while the last face with a circle has a cross marked on the other face. So, when you place the card face-up on the table, there's a 2/3 chance that the face facing you is one of the 2 faces with a circle that are on the same card. Hence, the answer is 2/3.

This is also known as the three-card swindle or the card version of Bertrand's box Paradox.

2) You'll most likely end up losing money :(

There's only 1/4 chance of you getting tails 2 times (NOT 1/3!). Hence, on average, for every $1.50 you give your friend, you get only $1.20 of it back.

No Joyce, you can't use any of these tricks to con people!

:)
Glen

okays i dunno what to put for the title so yea....

Anyways, regarding the class tee that we discussed this mornin, i had some fun to be honest.

But after a discussion wit mr lim with the seans, marcus and bangyong, we had came up with a design. We'll be showin u a sketch tmr mornin, so plsplspls try to come by 7:40! thanks!

Cheers,

Bryan

P.S. GET WELL SOON GLEN!WE MISS U

Puzzle 19

Hi!

Sigh... no one here as usual. :(
Moving on...

LUCK AND PROBABILITY (PART 1)

Difficulty: Very Hard


Don't worry, this isn't really that hard... probably.
There are a total of 2 questions to solve.

1) There are a total of 3 cards.

One of the cards has a circle marked on both sides.
The second card has a cross marked on both sides.
The last card has a circle marked on one side and a cross marked on the other side.

They are put into a box and mixed around. You randomly draw one of the cards and put it on a table. The side facing you has a circle marked on it.

What is the chance that the other side also has a circle marked on it?


2) You are playing a game with a friend. The game goes like this:

A coin is tossed. If it's heads, you must give your friend $0.50.
If it's tails, the coin is tossed a second time. Again, if it's heads, you must give your friend $0.50.
But, if it's tails again, your friend gives you $1.20.

If you play this game many times in a row, are you more likely to end up earning or losing money?


Now for the answer to puzzle 18...

The correct answer is surprisingly, E!

This puzzle has nothing to do with vocabulary. So it doesn't matter how easy it is to scatter the items listed in the choices.

Look more carefully at the words that make up the sentence again...

"I" has one letter.
"do" has 2 letters.
"not" has 3 letters.
"like" has 4 letters, and so on...

The number of letters in each word increases by one each time!
So, that means the missing word is made up of 8 letters, and the only choice that is made up of 8 letters is... broccolis!

:)
Glen