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## #4376 2012-12-19 18:39:40

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,730

### Re: 10 second questions

Hi bobbym,

The solutions #4488 and #4489 are correct. Superlative!

#4490. Find k, if the given value is the kth term of the given Arithmetic Progression : -1, -3, -5, -7 ...... x = -151.

#4491. Find a[sub]30[/sub] - a[sub]20[/sub] for the Arithmetic Progression : -9, -14, -19, -24, ........

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.

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## #4377 2012-12-19 20:25:32

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,415

### 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.

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## #4378 2012-12-20 18:40:50

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,730

### Re: 10 second questions

Hi bobbym,

The solutions #4490 and #4491 are correct. Neat work!

#4492. Two Arithmetic Progressions have the same common difference. The first term of one of these is 3, and that of the other is 8. What is the difference between their 2nd terms?

#4493. Two A.P.s have the same common difference. The first term of one of these is -1, and that of the other is -3. What is difference between their second term?

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.

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## #4379 2012-12-20 21:11:01

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,018

### 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.

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## #4380 2012-12-20 21:38:53

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,415

### 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.

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## #4381 2012-12-20 23:51:07

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,730

### Re: 10 second questions

Hi anonimnystefy and bobbym,

The solutions #4492 and #4493 are correct. Well done!

#4494. Find the sum : 2 + 4 + 6 + ....... + 200.

#4495. nth term of a sequence is a + nb. Find a[sub]4[/sub] - a[sub]3[/sub].

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.

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## #4382 2012-12-21 00:05:19

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,415

### 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.

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## #4383 2012-12-21 06:39:51

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,018

### 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.

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## #4384 2012-12-21 18:46:45

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,730

### Re: 10 second questions

Hi bobbym and anonimnystefy,

The solutions #4494 and #4495 are correct. Neat job!

#4496. How many two-digit numbers are divisible by 3?

#4497. Find the 11th term from the last term of the Arithmetic Progression : 10, 7, 4, ........, -62.

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.

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## #4385 2012-12-22 04:16:21

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,415

### 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.

Offline

## #4386 2012-12-22 19:14:23

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,730

### Re: 10 second questions

Hi bobbym,

The solution #4496 is correct. Good work!

The solution #4497

#4498. For what value of n, are the nth terms of two Arithmetic Progressions : 63, 65, 67, .... and 3, 10, 17, .... equal?

#4499. If a = 7, d = 3, n = 8, find a[sub]n[/sub].

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.

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## #4387 2012-12-22 19:15:35

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,247

### Re: 10 second questions

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

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## #4388 2012-12-22 21:50:33

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,018

### Re: 10 second questions

Hi ganesh

Last edited by anonimnystefy (2012-12-22 23:17:22)

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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## #4389 2012-12-22 22:05:21

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,415

### 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.

Offline

## #4390 2012-12-23 18:44:07

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,730

### Re: 10 second questions

Hi,

The solutions #4496 and #4497 are

, julianthemath.

The solutions #4498 and #4499 are correct. Excellent, anonimnystefy and bobbym!

#4500. If d = -3, n = 18, a[sub]n[/sub] = -5, find a.

#4501. If a = -18.9, d = 2.5, a[sub]n[/sub] = 3.6, find n.

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.

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## #4391 2012-12-23 19:28:07

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,415

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

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## #4392 2012-12-24 19:08:00

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,730

### Re: 10 second questions

Hi bobbym,

The solutions #4500 and #4501 are correct. Neat job!

#4502. If 6 times the 6th term of an Arithmetic Progression is equal 7 times the 7th term, then what is the 13th term of the A.P.?

#4503. If pth, qth, and rth terms of an Arithmetic Progression are a, b, c respectively, then a(q-r) + b(r-p) + c(p-q) = ?

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.

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## #4393 2012-12-24 22:12:01

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,415

### 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.

Offline

## #4394 2012-12-25 18:32:19

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,730

### Re: 10 second questions

Hi bobbym,

The solutions #4502 and #4503 are correct. Neat work!

#4504. In an Arithmetic Progression, if l = 28, S = 144, n = 9, find a.

#4505. In an Arithmetic Progression, if a = 3, n = 8, S = 192, find d.

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.

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## #4395 2012-12-25 21:37:41

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,018

### 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.

Offline

## #4396 2012-12-25 22:10:42

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,415

### 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.

Offline

## #4397 2012-12-26 19:23:08

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,730

### Re: 10 second questions

Hi anonimnystefy and bobbym,

The solutions #4504 and #4505

In triangle ABC, right angled at B, AB = 24 cm, BC = 7 cm. Determine:

#4506. sin A, cos A.

#4507. sin C, cos C.

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.

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## #4398 2012-12-26 21:23:55

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,415

### 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.

Offline

## #4399 2012-12-27 19:04:23

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,730

### Re: 10 second questions

Hi bobbym,

The solutions #4506 and #4507 are correct. Good work!

If sin A = 3/4, calculate

#4508. cos A

#4509. tan A.

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.

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## #4400 2012-12-28 08:07:49

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,415

### 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.

Offline