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#2051 2012-07-31 01:55:58

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,481

Re: Oral puzzles

Hi;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#2052 2012-07-31 22:56:08

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,425

Re: Oral puzzles

Hi anonimnystefy and bobbym,

The solution #1544 is perfect. Good work!

#1545. A train is moving at a speed of 132 kilometers per hour. If the length of the train is 110 meters, how long would it take to cross a platform 165 meters long?


Character is who you are when no one is looking.

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#2053 2012-07-31 22:59:56

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,481

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#2054 2012-07-31 23:48:26

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,522

Re: Oral puzzles

Hi ganesh


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#2055 2012-08-01 19:32:16

Denominator
Member
Registered: 2009-11-23
Posts: 155

Re: Oral puzzles

Hi guys;

This took me longer than expected to answer >_<

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#2056 2012-08-02 00:53:45

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,425

Re: Oral puzzles

Hi bobbym, anonimnystefy, and Denominator,

The solution #1545 is correct. Good work!

#1546. Two pipes A and B can fill the tank in 20 hours and pipe A alone can fill the tank in 36 hours. Find the time taken by B alone to fill the tank.


Character is who you are when no one is looking.

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#2057 2012-08-02 01:01:26

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,481

Re: Oral puzzles

Hi;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#2058 2012-08-02 01:13:49

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,522

Re: Oral puzzles

Hi ganesh


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#2059 2012-08-03 01:03:02

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,425

Re: Oral puzzles

Hi bobbym and anonimnystefy,

The solution #1546 is perfect. Neat work!

#1547. What Principal would yield $60 as Simple Interest at 6% per annum in 5 years?


Character is who you are when no one is looking.

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#2060 2012-08-03 02:10:31

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,481

Re: Oral puzzles

Hi;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#2061 2012-08-03 15:47:29

Denominator
Member
Registered: 2009-11-23
Posts: 155

Re: Oral puzzles

Hey

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#2062 2012-08-06 00:00:02

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,425

Re: Oral puzzles

Hi bobbym and Denominator,

The solution #1546 is perfect. Good work!

#1548. Find the missing figure: 0.25% of ? = 0.04


Character is who you are when no one is looking.

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#2063 2012-08-06 01:00:26

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,481

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#2064 2012-08-06 07:04:45

Denominator
Member
Registered: 2009-11-23
Posts: 155

Re: Oral puzzles

Hey ganesh

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#2065 2012-08-08 00:21:35

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,425

Re: Oral puzzles

Hi bobbym and Denominator,

Good work, bobbym!

#1549. Difference of two numbers is 1660. If 7.5% of one number is 12.5% of the other number, find the two numbers.


Character is who you are when no one is looking.

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#2066 2012-08-08 00:24:13

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,481

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#2067 2012-08-08 19:07:46

Denominator
Member
Registered: 2009-11-23
Posts: 155

Re: Oral puzzles

Oh I seeeee

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#2068 2012-08-08 23:24:11

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,425

Re: Oral puzzles

Hi bobbym and Denominator,

The solution #1549 is correct. Brilliant!

#1550. It costs $1 to photocopy a sheet of paper. However, 2% discount is allowed on all photocopies done after first 1000 sheets. How much would it cost to copy 5000 sheets of paper?


Character is who you are when no one is looking.

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#2069 2012-08-09 02:18:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,481

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#2070 2012-08-09 19:20:42

Denominator
Member
Registered: 2009-11-23
Posts: 155

Re: Oral puzzles

Hey ganesh;

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#2071 2012-08-09 23:52:04

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,425

Re: Oral puzzles

Hi bobbym and Denominator,

The solution #1550 is correct. Excellent!

#1551. The ratio of the base and the height of a cylinder is 2:3. If its volume is 12936 cubic cm, what is the total surface area of the cylinder? (Use pi = 22/7)


Character is who you are when no one is looking.

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#2072 2012-08-10 02:45:56

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,481

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#2073 2012-08-10 11:43:10

Denominator
Member
Registered: 2009-11-23
Posts: 155

Re: Oral puzzles

Hi ganesh

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#2074 2012-08-10 22:40:13

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,425

Re: Oral puzzles

Hi bobbym and Denominator,

Excellent, Denominator! Keep it up!

#1552. The curved surface area of a cylindrical pillar is 264 meters square and its volume is 924 cubic meters. Find the ratio of its diameter to its height.


Character is who you are when no one is looking.

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#2075 2012-08-10 22:47:59

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,481

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

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