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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Neat work!

SP#647. Find the number of terms in the Arithmetic Progression 18, 15½, 13, ...., -49½ and also find the sum of all its terms.

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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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Keep it up!

SP#648. The 19th term of an Arithmetic Progression is equal to three times its 6th term. If its 9th term is 19, find the first three terms of the Arithmetic Progression.

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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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Excellent!

SP#649. Find the sum of all multiples of 7 lying between 500 and 900.

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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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Brilliant!

SP#650. An Arithmetic Progression 5, 12, 19, ... has 50 terms. Find its last term. Hence, find the sum of its last 15 terms.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Excellent!

SP#651. Find the 60th term of the Arithmetic Progression 8, 10, 12, .. if it has a total of 60 terms and hence find the sum of its last 10 terms.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Excellent!

SP#652. If the sum of first 4 terms of an Arithmetic Progression is 40 and that of first 14 terms is 280, find the sum of its first n terms.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Splendid!

SP#653. Find the sum of natural numbers between 101 and 999 which are divisible by 2 and 5.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Brilliant!

SP#654. The sum of first ten terms of an Arithmetic Progression is 195 and sum of next ten terms of the Arithmetic Progression is 495. Find the common difference 'd'.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Excellent!

SP#655. Find the number of terms in an Arithmetic Progression whose first and last terms are -13 and 47 and whose sum is 272.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Excellent!

SP#656. Find the sum of first 100 even natural numbers divisible by 3.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

SP#657.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Excellent!

SP#658.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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