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#2076 2012-08-12 00:11:32

ganesh
Moderator
Registered: 2005-06-28
Posts: 13,849

Re: Oral puzzles

Hi bobbym,

The solution #1552 is correct. Excellent!

#1553. Two right circular cylinders of equal volumes have their heights in the ratio 1:2. What is the ratio of their radii?


Character is who you are when no one is looking.

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#2077 2012-08-12 05:52:49

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,265

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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#2078 2012-08-12 19:20:06

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

Re: Oral puzzles

Hello

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#2079 2012-08-12 23:54:26

ganesh
Moderator
Registered: 2005-06-28
Posts: 13,849

Re: Oral puzzles

Hi bobbym and Denominator,

The solution #1553 is perfect. Brilliant!

#1554. A well with 14 meters inside diameter is dug 10 meters deep. Earth taken out of it has been evenly spread all around it to a width of 21 meters to form an embankment. What is the height of the embankment? (Use pi = 22/7)


Character is who you are when no one is looking.

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#2080 2012-08-13 02:56:10

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,265

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.

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#2081 2012-08-13 02:56:26

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,265

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.

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#2082 2012-08-13 23:59:22

ganesh
Moderator
Registered: 2005-06-28
Posts: 13,849

Re: Oral puzzles

Hi bobbym,

The

.

#1555. If (a + b) : (b + c) : (c + a) = 6:7:8 and (a + b + c) = 14, then find the value of 'c'.


Character is who you are when no one is looking.

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#2083 2012-08-14 03:50:20

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,265

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.

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#2084 2012-08-14 22:12:28

ganesh
Moderator
Registered: 2005-06-28
Posts: 13,849

Re: Oral puzzles

Hi bobbym,

The solution #1555 is correct. Neat job!

#1556. $1210 is divided among A, B, and C so that A : B = 5 : 4 and B : C = 9 : 10. Then, how much does C gets?


Character is who you are when no one is looking.

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#2085 2012-08-15 00:10:26

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,265

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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#2086 2012-08-15 07:27:28

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

Re: Oral puzzles

Hello

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#2087 2012-08-15 22:46:11

ganesh
Moderator
Registered: 2005-06-28
Posts: 13,849

Re: Oral puzzles

Hi bobbym and Denominator,

The solution #1556 is perfect. Good work!

#1557. The salaries of Roger and Steve are in the ratio 2 : 3. If the salary of each is increased by $4000, the new ratio becomes 40 : 57. What is Steve's present salary?


Character is who you are when no one is looking.

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#2088 2012-08-15 22:51:54

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,265

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.

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#2089 2012-08-16 21:32:48

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

Re: Oral puzzles

Hello ganesh;

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#2090 2012-08-17 01:10:52

ganesh
Moderator
Registered: 2005-06-28
Posts: 13,849

Re: Oral puzzles

Hi bobbym and Denominator,

The solution #1557 is correct. Good work!

#1558. The third proportional to 0.36 and 0.48 is ____________


Character is who you are when no one is looking.

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#2091 2012-08-17 05:09:51

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,265

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.

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#2092 2012-08-17 23:57:06

ganesh
Moderator
Registered: 2005-06-28
Posts: 13,849

Re: Oral puzzles

Hi bobbym,

The

#1559. In a ratio, which is equal to 3 : 4, if the antecedent is 12, then the consequent is ______________


Character is who you are when no one is looking.

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#2093 2012-08-18 07:04:04

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,265

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.

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#2094 2012-08-18 15:21:39

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

Re: Oral puzzles

Hello ganesh;

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#2095 2012-08-19 01:13:28

ganesh
Moderator
Registered: 2005-06-28
Posts: 13,849

Re: Oral puzzles

Hi bobbym and Denominator,

The solution #1559 is correct. Neat work!

#1560. If 2A = 3B = 4C, then A : B : C is ______________


Character is who you are when no one is looking.

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#2096 2012-08-19 01:15:41

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,265

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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#2097 2012-08-19 02:42:58

dlamacharles
Member
Registered: 2012-08-19
Posts: 3

Re: Oral puzzles

1. 45
2. 7
3. 120
4. 7 and 10

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#2098 2012-08-19 19:00:30

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

Re: Oral puzzles

Hello

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#2099 2012-08-20 01:09:51

ganesh
Moderator
Registered: 2005-06-28
Posts: 13,849

Re: Oral puzzles

Hi bobbym and Denominator,

The solution #1560

Good work, Denominator!

#1561. The average age of three boys is 25 years and their ages are in the proportion 3 : 5 : 7. Find the age of the youngest boy.


Character is who you are when no one is looking.

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#2100 2012-08-20 07:54:22

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,265

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.

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