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#4301 2012-11-13 16:24:01

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi anonimnystefy and bobbym,

The solutions #4419 and #4420 are correct. Excellent!

#4421. Express each number as a product of its prime factors:
(a) 140
(b) 156
(c) 3825
(d) 5005
(e) 7429


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#4302 2012-11-13 17:46:13

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#4303 2012-11-14 17:13:15

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solutios (a), (b), (c), and (d) are correct. Excellent!

The solution (e)

#4422. Find the Least Common Multiple and Greatest Common Divisor of the following pairs of integers and verify that
LCM x GCD = product of the two numbers.
(a) 26 and 91
(b) 510 and 92
(c) 336 and 54


Character is who you are when no one is looking.

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#4304 2012-11-14 20:23:08

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#4305 2012-11-15 15:33:19

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solution(s) #4422 is/are correct. Good work!

#4423. The Least Common Multiple of two numbers is 64699, and their Greatest Common Divisor is 97. One of the numbers is 2231. Find the other.

#4424. The product of two numbers is 20736 and their Greatest Common Divisor is 54. Find their Least Common Multiple.


Character is who you are when no one is looking.

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#4306 2012-11-15 20:40:31

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#4307 2012-11-16 20:08:11

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solution #4423 is correct. Neat work!

#4425. Solve the following system of equations : x + y = 7; 2x - 3y = 11.

#4426. Solve : 2x - 7y = 1 and 4x + 3y = 15.


Character is who you are when no one is looking.

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#4308 2012-11-16 20:16:18

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#4309 2012-11-17 17:30:33

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solutions #4425 and #4426 are correct. Neat work!

#4427. Solve : 3x + 5y = 7 and 11x - 13y = 9.

#4428. Solve : 2x - y = 11 and 5x + 4y = 1.


Character is who you are when no one is looking.

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#4310 2012-11-17 22:01:18

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#4311 2012-11-18 17:50:19

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solutions #4427 and #4428 are correct. Excellent!

#4429. Solve : 3x - 5y - 4 = 0 and 9x = 2y + 7.

#4430. Solve : x/2 + 2y/3 = -1 and x - y/3 = 3.


Character is who you are when no one is looking.

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#4312 2012-11-18 18:49:29

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#4313 2012-11-19 19:05:07

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solutions #4429 and #4430 are correct. Neat work!

#4431. Solve :

#4432. Solve :


Character is who you are when no one is looking.

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#4314 2012-11-20 04:17:32

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#4315 2012-11-20 16:28:45

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solutions #4431 and #4432 are correct. Brilliant!

#4433. Solve :

#4434. Solve :

.


Character is who you are when no one is looking.

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#4316 2012-11-20 22:23:31

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi ganesh;

Do not worry about the error.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#4317 2012-11-21 16:21:48

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solutions #4433 and #4434 are correct. Neat work!

#4435. Solve :

#4436. Solve : 6x + 3y = 6xy and 2x + 4y = 5xy.


Character is who you are when no one is looking.

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#4318 2012-11-21 21:55:08

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#4319 2012-11-22 16:49:14

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solutions #4435 and #4436 are correct. Marvelous!

#4437.  Solve :

#4438. Solve :


Character is who you are when no one is looking.

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#4320 2012-11-22 21:23:57

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#4321 2012-11-23 20:47:09

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solutions #4437 and #4438 are correct. Brilliant!

#4439. Solve : 35x + 23y = 209 and 23x + 35y = 197.

#4440. Solve : 4/x + 5y = 7 and 3/x + 4y = 5.


Character is who you are when no one is looking.

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#4322 2012-11-23 20:51:06

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#4323 2012-11-24 18:11:28

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solutions #4439 and #4440 are correct. Smart work!

#4441. Solve :

.

#4442. Solve :

.


Character is who you are when no one is looking.

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#4324 2012-11-24 20:40:19

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,694

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#4325 2012-11-25 18:39:03

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,803

Re: 10 second questions

Hi bobbym,

The solutions #4441 and #4442 are perfect. Outstanding!

#4443. Seven times a two-digit number is equal to four times the number obtained by reversing the digits. If the difference between the digits is 3, find the number.

#4444. A takes 3 hours more than B to cover  distance of 30 kilometers. But, if A doubles his speed he is ahead of B by 90 minutes; find their speeds of walking.


Character is who you are when no one is looking.

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