Brainstorm >> 10

Ever heard of Alzheimer's disease?... locally known to Malaysians as 'nyanyuk'.... studies have shown that this disease can be prevented by a constant stimulation of the brain in mental stimulating activities such as Learning a new skill (sewing, music, origami etc.) sudoku, chess, mathematics and my brainstorms XD... kiranya sitting around doing nothing is a BIG FAT NO if you're planning on NOT having Alzheimer's in the future.... huhu ... macam penah post je tentang ni... xpe2.. well here's the newest one...

Using only the numbers and signs given,

create a sum where both sides are equal.

2, 3, 5, 7, 11, 12, –, x, x, /, ( ), ( ), =

Brainstorm >> 10

Here is an unusual safe. Each of the buttons must be pressed once only in the correct order to reach the centre X and open the safe. The number of moves and direction to move is marked on each button. Which button is the first you must press?

key:
N = north
E = East
S = South
W = West

Good Luck !

Brainstorm >> 9

How many miles should it be to Salzburg on this strange signpost?

for more BrainStoRms, click the BrainStoRms label on the side of this page

Brainstorm >> 8

What number should replace the question mark?



other brainstorms can be accessed from the labels tab on the right

Brainstorm >> 7

...BOILED EGG...


You just learnt the art of making the most perfect Boiled Egg...
'boiling it for exactly 15 minutes'

but...
your clock ran out of battery,
you left your watch at sleepover,
and your phone got stolen (poor you..)

all you have are two sand-clocksa 7-minute one,
and another 11-minute one...

how can you use them both
to boil your egg for exactly 15 minutes?

Brainstorm >> 6

What is the total value of the coloured boxes in fourth column?

Brainstorm >> 5

? = ?

brainstorm >>4

Brainstorm >> 4

You met this girl... and asked her age...

instead of giving a straight forward aswer, she smiled and said cryptically:

"The day before yesterday I was 22,
but next year I'll be 25."

What is her birthday and when was the date of our conversation?

brainstorm >> 3

brainstorm >> 3

i was inspired to make this post by a post on kepalakotak
it had been on my mind since form 5...
but it wasn't till then that i really looked into it...

so, here's the situation (also known as the monty hall problem)

You're in a game show...
there are 3 doors...
behind one of them is a car...
behind the other 2, are goats...

the host let's you choose 1 door..
if you choose the right door
you win the car !
if you choose the wrong door
you don't win the car!
simple as that...

so, you chose a door....
and you're hearts racing whether you made the right choice or not !

before revealing if you made the right choice or not,
the host opens 1 of the remaining 2 doors...
behind it is a goat!

so only two doors remain, a goat and a car...

the host then gives you the option
of either staying with your chosen door,
or change to the other closed door...


The Question...

What should you do to maximize the probability of winning the prize? Should you stick with your first choice, or switch to the other door?
Or does it not matter?

Brainstorm >> 2

BraiNStORm > 2

Here's the scenario....

There are two Painters...

Painter A can paint a house in 3 hours

Painter B can paint a house in 5 hours

If

Painter A & Painter B  paint the same house,

 at the same time, 

how long will it take to finish painting it?

happy brainstorming!!

BraiNStORm > 1

BraiNStORm > 1

there are 10 boxes...

each box has 10 marbles

each marble weighs 10 grams... 

you've got the picture? .... ok

now, the 10 marbles of one of the boxes 

were changed with another 10 marbles 

but each weighing 9 grams....

still with me? ... ok

How can you identify which box 

(1st/2nd/4th etc.) 

was the box which had its marbles changed 

by using 

>>>> a scale, only once ?

happy thinking!