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#1376 2011-09-17 23:35:48
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym,
The solution #1242 is correct. Excellent!
#1243. What is the volume of a right circular cylinder whose curved surface area is 2640 square centimeters and circumference of its base is 66 centimeters?
(Use
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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#1377 2011-09-17 23:52:51
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#1378 2011-09-19 17:32:38
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym,
The
#1244. The height of a right circular cylinder is 14 cm and its curved surface area is 704 square cm. Find its volume.
(Use
)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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#1379 2011-09-19 18:16:50
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#1380 2011-09-20 17:10:26
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym,
The solution #1244 is correct. Well done!
#1245. The ratio of the speeds of two trans is 7:8. If the second train runs 400 kilometers in 4 hours, then what is the speed of the first train?
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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#1381 2011-09-20 17:20:18
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#1382 2011-09-21 20:30:05
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym,
The solution #1245 is correct. Good work!
#1246. A car starts with the speed of 70 km/hour with its speed increasing every two hours by 10 km/hour. In how many hours would it cover 345 kilometers?
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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#1383 2011-09-21 20:58:17
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#1384 2011-09-21 23:03:52
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym,
#1247. An athlete runs 200 meters in 24 seconds. What is his speed in kilometers per hour?
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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#1385 2011-09-21 23:32:52
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#1386 2011-09-22 00:01:41
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym,
The solution #1247 is correct. Well done!
#1248. A number consists of two digits. The sum of the digits is 9. If 63 is subtracted from the number, its digits are interchanged. Find the 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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#1387 2011-09-22 00:18:18
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#1388 2011-09-22 18:06:00
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym,
The solution #1248 is correct. Well done!
#1249. How many liters of pure acid are there in 8 liters of a 20% solution?
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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#1389 2011-09-22 18:40:39
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#1390 2011-09-23 19:30:27
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym,
The solution #1249 is correct. Well done!
#1250. What is 5% of (25% of $1600)?
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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#1391 2011-09-23 22:49:45
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#1392 2011-09-23 23:28:12
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
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.
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#1393 2011-09-24 00:02:08
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym and anonimnystefy,
The solution #1250 is correct. Well done!
#1251. What is the ratio
equal to?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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#1394 2011-09-24 00:13:43
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#1395 2011-09-25 00:20:01
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym,
The solution #1251 is correct. Well done!
#1252. Find the Selling Price when
(i) Cost Price = $56.25, Gain = 20%.
(ii) Cost Price = $80.40, Loss = 5%.
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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#1396 2011-09-25 00:22:54
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#1397 2011-09-26 23:21:23
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym,
The solution #1252 (i) is correct. Well done!
The solution #1252 (ii) I get is
#1253. Find the Cost Price when (i) Selling Price = $40.60, Gain = 16% (ii) Selling Price = $51.70, Loss = 12%.
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.
Offline
#1398 2011-09-27 00:32:17
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#1399 2011-09-27 01:21:10
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,273
Re: Oral puzzles
Hi bobbym,
I get
#1254.
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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#1400 2011-09-27 01:36:18
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline