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#4051 2012-07-28 23:56:40

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,526

Re: 10 second questions

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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#4052 2012-07-29 22:53:47

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,459

Re: 10 second questions

Hi bobbym and anonimnystefy,

The solutions #4221 and #4222 are correct. Excellent!

#4223. A can do a piece of work in 20 days and B can do it in 30 days. How long would they take to do it working together?

#4224. A an do a piece of work in 6 days. A and B together can do the work in 4 days. How long would it take B to finish the work?


Character is who you are when no one is looking.

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#4053 2012-07-29 23:10:15

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,744

Re: 10 second questions

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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#4054 2012-07-30 00:04:47

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,526

Re: 10 second questions

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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#4055 2012-07-30 23:35:21

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,459

Re: 10 second questions

Hi bobbym and anonimnystefy,

The solutions #4223 and #4224 are correct. Neat work!

#4225. A and B together can reap a field in 10 hours, but by himself B requires 15 hours. How long would A take to reap the same field?

#4226. A and B can do a piece of work in 18 days, B and C in 24 days, and A & C in 36 days. In what time would they do it all working together?


Character is who you are when no one is looking.

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#4056 2012-07-31 00:08:46

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,526

Re: 10 second questions

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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#4057 2012-07-31 01:59:29

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,744

Re: 10 second questions

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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#4058 2012-07-31 22:38:50

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,459

Re: 10 second questions

Hi anonimnystefy and bobbym,

The solutions #4225 and #4226 are correct. Excellent!

#4227. A train running at the average speed of 45 kilometers per hour passes an electric pole in 10 seconds. Find the length of the train.

#4228. Length of the train is 500 meters. If the speed is 60 kilometers per hour, then find the time to cross a pole.


Character is who you are when no one is looking.

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#4059 2012-07-31 22:46:35

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,744

Re: 10 second questions

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

#4060 2012-07-31 23:44:44

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,526

Re: 10 second questions

Hi ganesh

And congrats on 10000 posts. smile

Last edited by anonimnystefy (2012-07-31 23:56:09)


“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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#4061 2012-08-01 19:35:59

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

Re: 10 second questions

Hello!

I don't like trains >_<

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#4062 2012-08-02 00:38:40

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,459

Re: 10 second questions

Hi bobbym, anonimnystefy, and Denominator,

The solutions #4227 and #4228 are correct. Neat job! (Denominator, the solution #4227 is 125 meters, not 1250 meters).

Thanks a lot, anonimnystefy (On 10,000 posts)!

#4229. A cistern can be filled by tap A in 4 hours and B in 3 hours. How long would it take to fill if both taps are opened together?

#4230. Pipe A can fill a tank in 5 hours, pipe B in 10 hours, and C in 30 hours. If all the pipes are open, in how many hours would the tank be filled?


Character is who you are when no one is looking.

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#4063 2012-08-02 01:03:53

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,744

Re: 10 second questions

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

#4064 2012-08-02 01:20:33

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,526

Re: 10 second questions

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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#4065 2012-08-03 00:56:18

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,459

Re: 10 second questions

Hi bobbym and anonimnystefy,

The solutions #4229 and #4230 are correct. Good work!

#4231. Find the Simple Interest on $1500 for 3 years at 10% per annum.

#4232. At what rate per annum would $5200 earn $624 in 2 years?


Character is who you are when no one is looking.

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#4066 2012-08-03 02:12:35

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,744

Re: 10 second questions

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

#4067 2012-08-03 15:57:49

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

Re: 10 second questions

Hey

Yeah I must have added an extra zero in my working somewhere XD, sorry!

Last edited by Denominator (2012-08-03 15:58:53)

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#4068 2012-08-05 23:49:11

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,459

Re: 10 second questions

Hi bobbym and Denominator,

bobbym : The solution #4231

Denominator : All correct. Outstanding!

#4233. Find the missing figures. ?% of 25 = 2.125

#4234. Find the missing figures. 9% of ? = 63


Character is who you are when no one is looking.

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#4069 2012-08-06 01:03:29

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,744

Re: 10 second questions

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

#4070 2012-08-06 07:07:10

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

Re: 10 second questions

Hey ganesh

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#4071 2012-08-08 00:05:34

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,459

Re: 10 second questions

Hi bobbym and Denominator,

The solutions #4233 and #4234 are correct. Neat job!

#4235. Which is greatest in 16 2/3%, 2/15, and 0.17?

#4236. A inspector rejects 0.08% of the meters as defective. How many will he examine to reject 2?


Character is who you are when no one is looking.

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#4072 2012-08-08 00:14:52

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,744

Re: 10 second questions

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

#4073 2012-08-08 07:17:31

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

Re: 10 second questions

Hi ganesh,


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#4074 2012-08-08 23:10:43

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,459

Re: 10 second questions

Hi bobbym and Denominator,

Both the solutions #4235 and #4236 are perfect, bobbym! Good work!

Denominator, the solution #4235 is correct. Well done!

#4237. 88% of 370 + 24% of 210 - ? = 118

#4238. 860% of 50 + 50% of 860 = ?


Character is who you are when no one is looking.

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#4075 2012-08-09 02:21:26

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,744

Re: 10 second questions

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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