Math Is Fun Forum

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,421

Re: 10 second questions

Hi bobbym,

The solutions #4409 and #4410 are correct. Neat work!

#4411. A does half as much work as B in three-fourth of the time. If together they take 21 days to complete the work, how much time would B take to do it?

#4412. A can do a certain job in 15 days. B is 50% more efficient than A. Find the number of days it takes B to do the same piece of work.

---

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.

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.

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,421

Re: 10 second questions

Hi bobbym and anonimnystefy,

The solution #4411 is

Good work, bobbym!

The solution #4412 is correct, bobbym and anonimnystefy! Neat work!

#4413. A, B, and C together earn $350 per day. While A and C earn $200 and B and C together earn $180. Find the daily earning of C.

#4414. 4 men and 6 women finish a job in 8 days; while 3 men and 7 women finish it in 10 days. In how many days would 10 women working together finish it?

---

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.

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,421

Re: 10 second questions

Hi bobbym,

The solutions #4413 and #4414 are correct. Neat work!

#4415. Two persons A and B working together can dig a trench in 10 hours while A alone can dig it in 14 hours. In how many hours B alone can dig such a trench?

#4416. A and B can together finish a work in 40 days. They worked it for 30 days and then B left. The remaining work was done by A alone in 30 more days. In how many days A alone can finish the work?

---

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.

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,421

Re: 10 second questions

Hi bobbym,

The solutions #4415 and #4416 are correct. Good work!

#4417. Remo can complete a work in 12 days, working 8 hours a day. Mike can complete the same work in 8 days, working 10 hours a day. If Remo and Mike work together working 8 hours a day, in how many days can they complete the work?

#4418. 8 men and 12 boys take 12 days and 16 days to complete a job. 16 men began working on it but after 3 days, 10 men left and were replaced by 4 boys. In how many days the remaining work be completed by them?

---

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.

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,421

Re: 10 second questions

Hi bobbym,

The solutions #4417 and #4418 are correct. Good work!

#4419. If 18 workers can complete a job in 15 days, how many additional number of workers are required to complete the same job in 10 days?

#4420. A can do a piece of work in 5 days which B alone can do in 7 days. In how many days would they finish the work, both working together?

---

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.

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

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

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,421

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

---

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.

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,421

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

---

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.

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,421

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.

---

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.

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,421

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.

---

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.

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,421

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.

---

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.

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,421

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.

---

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.

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.