IQ Test, Logic test, Fun :)
Hope this thread will be popular, cuz I like such Logic game/test
Rules is simple. You need to guess an answer for a question
So lets roll it!
Here you are the first question:
Why all manholes have round forms? ;)
There are several reasons for the shape that include:
A round manhole cover cannot fall through its circular opening, whereas a square manhole cover may fall in if it were inserted diagonally in the aperture (A Reuleaux triangle or other curve of constant width would also serve this purpose, but round covers are much easier to manufacture.)
Round tubes are the strongest and most material-efficient shape against the compression of the earth around them, and so it is natural that the cover of a round tube assume a circular shape.
The bearing surfaces of manhole frames and covers are machined to assure flatness and prevent them from becoming dislodged by traffic. Round castings are much easier to machine using horizontal boring mills.
Circular covers do not need to be rotated to align them when covering a circular manhole.
Human beings have a roughly circular cross-section.
A round manhole cover can be more easily moved by being rolled.
If an automobile rolls over a dislodged manhole of another shape, the sharp corners could puncture the automobile's tire, whereas a circle doesn't have corners.
It's easier to dig a circular hole.
Tradition
Aesthetics
Originally posted by zhadyThere are several reasons for the shape that include:
A round manhole cover cannot fall through its circular opening, whereas a square manhole cover may fall in if it were inserted diagonally in the aperture (A Reuleaux triangle or other curve of constant width would also serve this purpose, but round covers are much easier to manufacture.)
Round tubes are the strongest and most material-efficient shape against the compression of the earth around them, and so it is natural that the cover of a round tube assume a circular shape.
The bearing surfaces of manhole frames and covers are machined to assure flatness and prevent them from becoming dislodged by traffic. Round castings are much easier to machine using horizontal boring mills.
Circular covers do not need to be rotated to align them when covering a circular manhole.
Human beings have a roughly circular cross-section.
A round manhole cover can be more easily moved by being rolled.
If an automobile rolls over a dislodged manhole of another shape, the sharp corners could puncture the automobile's tire, whereas a circle doesn't have corners.
It's easier to dig a circular hole.
Tradition
Aesthetics
Hope you wrote it by yourself :)
and one more reason how I understand :
[blockquote]With same area of disk among the figures has lower perimeter, that mean that we need less material percentage for making manhole.[/blockquote]
Am I right? :)
http://www.eduqna.com/Trivia/917-Trivia-6.html
oh noes :D
14/02/2011 10:06(edited 14/02/2011 10:06)Originally posted by Ggs`[blockquote]With same area of disk among the figures has lower perimeter, that mean that we need less material percentage for making manhole.[/blockquote]
Am I right? :)
Not really. The size is not a matter here, and there are downsides to the use of circles when doing manholes. It's still the best shape in comparison to other ones, though.
ok next one :
[blockquote]A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?[/blockquote] :mistrust:
Originally posted by Ggs`ok next one :
[blockquote]A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?[/blockquote] :mistrust:
he wasn't born yet => father continues to caress the future mother
yes ?
father is doing it with mom....
well... the dad is with the mom, if u calculate it, you will see that the kid will be born in 9 months and the mom is pregnant.
X = Z+21
Z+6 = (X+6)/5
(X-21)+6 = X/5 + 6/5
X-15 = X/5 + 6/5
(4/5)X = 15 + 6/5
4X = 75 + 6
X = (81)/4 = 20.25
Z = X-21 = -(3/4) = -9 months
x= mother z= kid btw
Einstein's Problem
The author of this problem is Albert Einstein who said that 98% of the people in the world couldn't solve it.
Facts:
1. There are 5 houses (along the street) in 5 different colors:
blue, green, red, white and yellow.
2. In each house lives a person of a different nationality:
Brit, Dane, German, Norwegian and Swede.
3. These 5 owners
drink a certain beverage:
beer, coffee, milk, tea and water,
smoke a certain brand of cigar:
Blue Master, Dunhill, Pall Mall, Prince and blend,
and keep a certain pet:
cat, bird, dog, fish and horse.
4. No owners have the same pet, smoke the same brand of cigar, or drink the same beverage.
Hints:
1. The Brit lives in a red house.
2. The Swede keeps dogs as pets.
3. The Dane drinks tea.
4. The green house is on the left of the white house (next to it).
5. The green house owner drinks coffee.
6. The person who smokes Pall Mall rears birds.
7. The owner of the yellow house smokes Dunhill.
8. The man living in the house right in the center drinks milk.
9. The Norwegian lives in the first house.
10. The man who smokes blend lives next to the one who keeps cats.
11. The man who keeps horses lives next to the man who smokes Dunhill.
12. The owner who smokes Blue Master drinks beer.
13. The German smokes Prince.
14. The Norwegian lives next to the blue house.
15. The man who smokes blend has a neighbor who drinks water.
ps : I'm one of those 98% ^^
well... What's the question?
The question is: Who keeps fish? :)
17/02/2011 19:55I can solve it, but it takes time and it's boring. Tell Einstein that.
http://www10.speedyshare.com/files/26927668/download/namnl%C3%B6s.bmp
there my brain collapses, i know the answer but i wanna solve it myself...
Gonna give it more time laterZ
I remember i solved this prob with 2 friends once.It took us like 15mins but i dont remember the answer and im not sure i can solve it alone :D
17/02/2011 21:38(edited 17/02/2011 22:05)Did it in 6 minutes with Excel. Thanks for this, keep them coming :D
17/02/2011 22:14Just solve things by association and you'll have everything done pretty quickly. It's just like solving Minesweeper, haha.
@qfiman*: true, removed.
yay. did it in 30mins =P
thx for the excel-hint, kkz. no need to get up for pen and paper... ;)
edit: maybe im not that smart, vee :D
edit2a: thx remake =)
Originally posted by Ggs`Einstein's Problem
The author of this problem is Albert Einstein who said that 98% of the people in the world couldn't solve it.
Facts:
1. There are 5 houses (along the street) in 5 different colors:
blue, green, red, white and yellow.
2. In each house lives a person of a different nationality:
Brit, Dane, German, Norwegian and Swede.
3. These 5 owners
drink a certain beverage:
beer, coffee, milk, tea and water,
smoke a certain brand of cigar:
Blue Master, Dunhill, Pall Mall, Prince and blend,
and keep a certain pet:
cat, bird, dog, fish and horse.
4. No owners have the same pet, smoke the same brand of cigar, or drink the same beverage.
Hints:
1. The Brit lives in a red house.
2. The Swede keeps dogs as pets.
3. The Dane drinks tea.
4. The green house is on the left of the white house (next to it).
5. The green house owner drinks coffee.
6. The person who smokes Pall Mall rears birds.
7. The owner of the yellow house smokes Dunhill.
8. The man living in the house right in the center drinks milk.
9. The Norwegian lives in the first house.
10. The man who smokes blend lives next to the one who keeps cats.
11. The man who keeps horses lives next to the man who smokes Dunhill.
12. The owner who smokes Blue Master drinks beer.
13. The German smokes Prince.
14. The Norwegian lives next to the blue house.
15. The man who smokes blend has a neighbor who drinks water.
ps : I'm one of those 98% ^^
I know this one, finished it like 5 years ago on paper ^^. Can't remember it now :-s
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