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#2251 2012-10-27 23:52:54

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,752

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#2252 2012-10-28 21:12:20

ganesh
Moderator
Registered: 2005-06-28
Posts: 12,968

Re: Oral puzzles

Hi bobbym,

#1628. What is log[sub]3[/sub]27?


Character is who you are when no one is looking.

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#2253 2012-10-28 21:13:51

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,847

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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#2254 2012-10-29 00:02:25

ganesh
Moderator
Registered: 2005-06-28
Posts: 12,968

Re: Oral puzzles

Hi anonimnystefy,

The solution #1628 is correct. Neat job!

#1629. Evaluate : log[sub]100[/sub](0.01)


Character is who you are when no one is looking.

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#2255 2012-10-29 00:33:23

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,752

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#2256 2012-10-29 21:39:58

ganesh
Moderator
Registered: 2005-06-28
Posts: 12,968

Re: Oral puzzles

Hi bobbym,

The solution #1629 is correct. Excellent!

#1630. If log 27 = 1.431, then what is the value of log 9?


Character is who you are when no one is looking.

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#2257 2012-10-29 21:44:42

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,752

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#2258 2012-10-30 22:13:19

ganesh
Moderator
Registered: 2005-06-28
Posts: 12,968

Re: Oral puzzles

Hi bobbym,

The solution #1630 I get is

#1631. If log [sub]10[/sub]2 = 0.3010, then what is the value of log [sub]2[/sub] 10?


Character is who you are when no one is looking.

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#2259 2012-10-30 22:19:09

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,847

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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#2260 2012-10-30 22:39:03

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,752

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#2261 2012-11-01 16:58:47

ganesh
Moderator
Registered: 2005-06-28
Posts: 12,968

Re: Oral puzzles

Hi anonimnystefy and bobbym,

The solution #1631 is correct. Good work!

#1632. If log 2 = 0.3010 and log 3 = 0.4771, then what is the value of log[sub]5[/sub]512?


Character is who you are when no one is looking.

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#2262 2012-11-01 19:04:39

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,752

Re: Oral puzzles

Hi;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#2263 2012-11-02 18:49:01

ganesh
Moderator
Registered: 2005-06-28
Posts: 12,968

Re: Oral puzzles

Hi bobbym,

The solution #1632 is correct. Neat job!

#1633. If log 2 = 0.30103 find the number of digits in 4[sup]50[/sup].


Character is who you are when no one is looking.

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#2264 2012-11-02 23:23:33

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,752

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#2265 2012-11-03 01:44:47

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,847

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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#2266 2012-11-03 18:08:30

ganesh
Moderator
Registered: 2005-06-28
Posts: 12,968

Re: Oral puzzles

Hi bobbym and anonimnystefy,

The solution is

Neat work, bobbym!

#1634. If log 2 = 0.30103, find the number of digits of 5[sup]20[/sup].


Character is who you are when no one is looking.

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#2267 2012-11-03 21:15:31

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,752

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#2268 2012-11-04 17:57:44

ganesh
Moderator
Registered: 2005-06-28
Posts: 12,968

Re: Oral puzzles

Hi bobbym,

The solution #1634 is correct. Neat work!

#1635. Evaluate :
(i) log[sub]7[/sub]1
(ii) log[sub]34[/sub]34
(iii)


Character is who you are when no one is looking.

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#2269 2012-11-04 19:01:47

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,752

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#2270 2012-11-05 18:48:06

ganesh
Moderator
Registered: 2005-06-28
Posts: 12,968

Re: Oral puzzles

Hi bobbym,

The solutions (all the three parts) are correct. Good work!

#1636. The speed of a boat in still water in 11 kilometers per hour and the rate of current is 4 kilometers per hour. Find the distance traveled downstream in 16 minutes.


Character is who you are when no one is looking.

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#2271 2012-11-05 20:14:53

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,752

Re: Oral puzzles

Hi;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#2272 2012-11-06 17:41:32

ganesh
Moderator
Registered: 2005-06-28
Posts: 12,968

Re: Oral puzzles

Hi bobbym,

The solution #1636 is perfect. Neat job!

#1637. A cistern is filled by pipe A is 9 hours and the cistern can be leaked out by an exhaust pipe B in 10 hours. If both the pipes are opened, in what time would the istern be full?


Character is who you are when no one is looking.

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#2273 2012-11-06 17:48:40

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,847

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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#2274 2012-11-06 20:29:11

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,752

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#2275 2012-11-07 18:53:22

ganesh
Moderator
Registered: 2005-06-28
Posts: 12,968

Re: Oral puzzles

Hi anonimnystefy and bobbym,

The solution #1637 is correct. Good work!

#1638. Taps A and B can fill a bucket in 10 minutes and 15 minutes respectively. If both pipes are opened and A is closed after 3 minutes, how much further time would it take for B to fill the bucket?


Character is who you are when no one is looking.

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