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#4351 2012-12-13 17:46:35

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,839

Re: 10 second questions

Hi bobbym,

The solutions #4476 and #4477 are correct. Excellent!

#4478. Find the sum of first 22 terms of an Arithmetic Progression in which d = 7 and 22nd term is 149.

#4479. Find the sum of first 51 terms of an Arithmetic Progression whose second and third terms are 14 and 18 respectively.


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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#4352 2012-12-13 20:56:39

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.

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#4353 2012-12-14 21:51:07

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,839

Re: 10 second questions

Hi bobbym,

The solution

The solution #4479 is correct. Neat work!

#4480. Find the sum of the first 40 positive integers divisible by 6.

#4481. Find the sum of the first 15 multiples of 8.


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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#4354 2012-12-14 22:52:43

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.

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#4355 2012-12-15 19:02:39

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,839

Re: 10 second questions

Hi bobbym,

The solutions #4480 and #4481 are perfect. Stupendous!

#4482. Find the sum of all the two-digit natural numbers which are divisible by 4.

#4483. Find the sum of all natural numbers between 100 and 200 which are divisible by 4.


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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#4356 2012-12-15 21:19:09

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.

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#4357 2012-12-16 19:21:10

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,839

Re: 10 second questions

Hi bobbym,

The solutions #4482 and #4483 are correct. Excellent!

#4484. Find the sum of all the natural numbers less than 100 which are divisible by 6.

#4485. Find the sum of all natural numbers between 100 and 500 which are divisible by 8.


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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#4358 2012-12-16 21:57:02

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.

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#4359 2012-12-17 18:22:21

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,839

Re: 10 second questions

Hi bobbym,

The solutions #4484 and #4485 are correct. Good work!

#4486. Find the number of terms of the Arithmetic Progression 54, 51, 48, .... so that their sum is 513.

#4487. If the nth term of an Arithmetic Progression is (2n + 1), find the sum of first n terms of the Arithmetic Progression.


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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#4360 2012-12-17 20:56:52

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

Re: 10 second questions


I Don't Know 4487.


Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate
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#4361 2012-12-17 21:09:48

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.

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#4362 2012-12-18 19:51:40

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,839

Re: 10 second questions

Hi julianthemath and bobbym,

The solution #4486 is correct; Excellent, julianthemath!

The solutions #4486 and #4487 are correct; Brilliant, bobbym!

The solution #4487

, julianthemath!

#4488. The sum of the third and the seventh terms of an Arithmetic Progression is 6 and their product is 8. Find the sum of first sixteen terms of the Arithmetic Progression.

#4489. Which term of the Arithmetic Progression : 121, 117, 113, ...... , is the first negative term?


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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#4363 2012-12-18 22:17:14

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.

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#4364 2012-12-19 18:39:40

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,839

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 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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#4365 2012-12-19 20:25:32

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.

Offline

#4366 2012-12-20 18:40:50

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,839

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 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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#4367 2012-12-20 21:11:01

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.

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#4368 2012-12-20 21:38:53

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.

Offline

#4369 2012-12-20 23:51:07

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,839

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 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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#4370 2012-12-21 00:05:19

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.

Offline

#4371 2012-12-21 06:39:51

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.

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#4372 2012-12-21 18:46:45

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,839

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 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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#4373 2012-12-22 04:16:21

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.

Offline

#4374 2012-12-22 19:14:23

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,839

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 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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#4375 2012-12-22 19:15:35

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

Re: 10 second questions



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

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