Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,307

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,327

Re: Oral puzzles

Hi bobbym,

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


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,016

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
The knowledge of some things as a function of age is a delta function.

Offline

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,327

Re: Oral puzzles

Hi anonimnystefy,

The solution #1628 is correct. Neat job!

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


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,307

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,327

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?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,307

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,327

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?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,016

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
The knowledge of some things as a function of age is a delta function.

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,307

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,327

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?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,307

Re: Oral puzzles

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,327

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].


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,307

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,016

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
The knowledge of some things as a function of age is a delta function.

Offline

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,327

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].


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,307

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,327

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)


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,307

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,327

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.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,307

Re: Oral puzzles

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,327

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?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,016

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
The knowledge of some things as a function of age is a delta function.

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,307

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,327

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?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

Board footer

Powered by FluxBB