#4826 2014-05-20 13:53:03

ShivamS

Member

Registered: 2011-02-07

Posts: 3,648

Re: 10 second questions

bobbym

Administrator

From: Bumpkinland

Registered: 2009-04-12

Posts: 105,325

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.
No great discovery was ever made without a bold guess.

ganesh

Moderator

Registered: 2005-06-28

Posts: 21,334

Re: 10 second questions

Hi ShivamS and bobbym,

The solutions #4975 and #4976 are correct. Marvelous!

#4977. If

and

, find the value of

.

#4978. If a + b + c = 13,

, find the value of
ab + bc + ca.

---

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

bobbym

Administrator

From: Bumpkinland

Registered: 2009-04-12

Posts: 105,325

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.
No great discovery was ever made without a bold guess.

ganesh

Moderator

Registered: 2005-06-28

Posts: 21,334

Re: 10 second questions

Hi bobbym,

The solutions #4977 and #4978 are correct. Excellent!

#4979. If

and x + y = 3z, then find the value of z.

#4980.

---

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

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: 16,016

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

Administrator

From: Bumpkinland

Registered: 2009-04-12

Posts: 105,325

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.
No great discovery was ever made without a bold guess.

ganesh

Moderator

Registered: 2005-06-28

Posts: 21,334

Re: 10 second questions

Hi anonimnystefy and bobbym,

The solution #4980 is perfect, anonimnystefy! Excellent!
bobbym, I made a mistake in the problem; regretted.

#4981.

---

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

bobbym

Administrator

From: Bumpkinland

Registered: 2009-04-12

Posts: 105,325

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.
No great discovery was ever made without a bold guess.

ganesh

Moderator

Registered: 2005-06-28

Posts: 21,334

Re: 10 second questions

Hi bobbym,

The solution #4981 is perfect. Splendid!

#4982. Find the value of x

.

#4983

---

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

bobbym

Administrator

From: Bumpkinland

Registered: 2009-04-12

Posts: 105,325

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.
No great discovery was ever made without a bold guess.

ganesh

Moderator

Registered: 2005-06-28

Posts: 21,334

Re: 10 second questions

Hi bobbym,

#4984. How many pieces of 85 cm length can be cut from a rod 42.5 meters long?

#4985.

---

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

bobbym

Administrator

From: Bumpkinland

Registered: 2009-04-12

Posts: 105,325

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.
No great discovery was ever made without a bold guess.

ganesh

Moderator

Registered: 2005-06-28

Posts: 21,334

Re: 10 second questions

Hi bobbym,

The solution [hide=#4984]I get 50.
Number of pieces = 42.5 x 100/85 = 4250/85 = 50

The solution #4985 is perfect. Exemplary!

PS : Thanks for the replies. I shall post 'English Language Puzzles' soon.

#4986.

---

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

bobbym

Administrator

From: Bumpkinland

Registered: 2009-04-12

Posts: 105,325

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.
No great discovery was ever made without a bold guess.

Denominator

Member

Registered: 2009-11-23

Posts: 155

Re: 10 second questions

Hello

Thanks

ganesh

Moderator

Registered: 2005-06-28

Posts: 21,334

Re: 10 second questions

Hi bobbym and Denominator,

The solution #4986 is correct. Stupendous!

#4987. If

, then what is the value of

?

#4988. Given

and

,
find the value of

.

---

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

bobbym

Administrator

From: Bumpkinland

Registered: 2009-04-12

Posts: 105,325

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.
No great discovery was ever made without a bold guess.

ganesh

Moderator

Registered: 2005-06-28

Posts: 21,334

Re: 10 second questions

Hi bobbym,

The solutions #4987 and #4988 are correct. Magnificent!

#4989.

#4990.

---

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

bobbym

Administrator

From: Bumpkinland

Registered: 2009-04-12

Posts: 105,325

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.
No great discovery was ever made without a bold guess.

ShivamS

Member

Registered: 2011-02-07

Posts: 3,648

Re: 10 second questions

I need a little explanation on how 4990 can be done in about 10 seconds.

bobbym

Administrator

From: Bumpkinland

Registered: 2009-04-12

Posts: 105,325

Re: 10 second questions

It can be shortened algebraically but still required a calculator.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

ShivamS

Member

Registered: 2011-02-07

Posts: 3,648

Re: 10 second questions

Okay, because I thought I was missing something.

bobbym

Administrator

From: Bumpkinland

Registered: 2009-04-12

Posts: 105,325

Re: 10 second questions

I can not even write the problems down in less than a minute. 10 seconds, I am too slow for that.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

ganesh

Moderator

Registered: 2005-06-28

Posts: 21,334

Re: 10 second questions

Hi bobbym and ShivamS,

I made a mistake owing to my poor vision. The problem actually stated:

#4990.

The corrected version :

#4990.

Inconvenience regretted!

---

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.