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#4076 2012-08-13 23:40:39
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: 10 second questions
Hi anonimnystefy, bobbym, and Denominator,
The and Well done, the solution #4245 is correct, bobbym and Denominator!
#4247. If x/5 = y/8, then (x + 5) : (y + 8) is equal to what ratio?
#4248. If a/3 = b/4 = c/7, then (a + b + c)/c is equal to what?
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#4077 2012-08-14 03:53:59
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#4078 2012-08-14 07:46:59
- Denominator
- Member
- Registered: 2009-11-23
- Posts: 220
Re: 10 second questions
Hello ganesh;
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#4079 2012-08-14 22:04:05
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: 10 second questions
Hi bobbym and Denominator,
The solutions #4247 and #4248 are correct. Good work!
#4249. Two numbers are in the ratio 3 : 5. If 9 is subtracted from each, the new numbers are in the ratio 12 : 23. Find the smaller number.
#4250. Two numbers are in the ratio 1 : 2. If 7 is added to both, their ratio changes to 3 : 5. Find the greatest number.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#4080 2012-08-15 00:13:01
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#4081 2012-08-15 07:38:33
- Denominator
- Member
- Registered: 2009-11-23
- Posts: 220
Re: 10 second questions
Hello
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#4082 2012-08-15 22:36:16
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: 10 second questions
Hi bobbym and Denominator,
The solutions #4249 and #4250 are correct. Neat job!
#4251. The ratio of three numbers is 3 : 4 : 5 and the sum of their squares is 1250. What is the sum of the numbers?
#4252. The ratio of three numbers is 3 : 4 : 7 and their product is 18144. Find the numbers.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#4083 2012-08-15 22:48:41
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi;
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#4084 2012-08-16 07:16:24
- Denominator
- Member
- Registered: 2009-11-23
- Posts: 220
Re: 10 second questions
Hello
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#4085 2012-08-17 01:00:11
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: 10 second questions
Hi bobbym and Denominator,
The solutions and
Excellent, bobbym!
#4253. The fourth proportional to 5, 8, 15 is ____________
#4254. The mean proportional between 234 and 104 is _____________
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#4086 2012-08-17 05:13:11
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#4087 2012-08-17 23:45:04
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: 10 second questions
Hi bobbym,
The solutions #4253 and #4254 are correct. Neat work!
#4255. The third proportional to (x[sup]2[/sup] - y[sup]2[/sup]) and (x - y) is __________________
#4256. The ratio of third proportional to 12 and 30 and the mean proportional between 9 and 25 is ________________
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#4088 2012-08-18 07:11:45
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#4089 2012-08-18 15:15:51
- Denominator
- Member
- Registered: 2009-11-23
- Posts: 220
Re: 10 second questions
Sorry, but what does proportional mean?
I don't really get this!
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#4090 2012-08-19 00:44:36
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: 10 second questions
Hi bobbym and Denominator,
The solutions and
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#4091 2012-08-19 00:46:55
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi ganesh;
I got those in post #4100
Sorry, but what does proportional mean?
I don't really get this!
Hi Denominator;
Did you google for them? Are you just stuck on mean and third and fourth proportional or more basic than that?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#4092 2012-08-19 01:04:25
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: 10 second questions
Hi bobbym and Denominator,
The solutions #4255 and #4256 are correct, bobbym! Excellent!
#4257. If $782 is divided into three parts, proportional to 1/2 : 2/3 : 3/4, then the first part is __________________
#4258. If 76 is divided into four parts proportional to 7, 5, 3, 4, then the smallest part is _________________
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#4093 2012-08-19 01:10:21
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#4094 2012-08-19 03:05:54
- dlamacharles
- Member
- Registered: 2012-08-19
- Posts: 3
Re: 10 second questions
7, 14, 21, 28,....
a=7
d=7
n=?
Tn=98
Tn=a+(n-1)d
n=14
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#4095 2012-08-19 03:22:32
- dlamacharles
- Member
- Registered: 2012-08-19
- Posts: 3
Re: 10 second questions
Proportion is a factor of equality.
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#4096 2012-08-19 19:21:58
- Denominator
- Member
- Registered: 2009-11-23
- Posts: 220
Re: 10 second questions
Yeah, I understand what proportion is, but I just didn't understand it in the context of 4255 and 4256
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#4097 2012-08-19 20:38:28
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#4098 2012-08-20 00:51:01
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: 10 second questions
Hi bobbym and Denominator,
The solutions #4257 and #4258 are correct. Excellent!
#4259. 85 kilograms of a mixture contains milk and water in the ratio 27 : 7. How much more water is to be added to get a new mixture containing milk and water in the ratio 3 : 1?
#4260. The ages of A and B are in the ratio 3 : 1. Fifteen years hence, the ratio would be 2 : 1. Find their present ages.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#4099 2012-08-20 07:57:31
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#4100 2012-08-20 16:55:13
- Denominator
- Member
- Registered: 2009-11-23
- Posts: 220
Re: 10 second questions
Hello
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