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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,227

Hi,

.

The solution SP#587 is correct. Neat work, Monox D. I-Fly!

SP#588. Find the sum of n terms of the following sequence: 3, 8, 13, 18, ....

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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**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,936

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.

May his adventurous soul rest in peace at heaven.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,227

Hi,

.

The solution SP#587 is correct. Neat work, Monox D. I-Fly!

SP#588. Write the algebra of 10, 18, 26, .... Calculate the sum of first 30 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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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,227

Hi,

.

SP#589. The eighth term of an Arithmetic Progression is 40. Calculate the sum of first 15 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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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,227

Hi,

SP#590. Find the sum of first 20 natural numbers. How much more is the sum of first 40 natural numbers than this?

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

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**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,936

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.

May his adventurous soul rest in peace at heaven.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,227

Hi Monox D. I-Fly,

.

The former part of the solution is correct. Neat work!

SP#591. The sum of first 21 terms of an Arithmetic Progression is 630. Find its eleventh term.

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,227

Hi,

.

SP#592. 21 is the middle term of an arithmetic sequence. How many terms are there in this sequence?

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,227

Hi,

SP#593. The 5th term of an Arithmetic Progression is 40 and the 10th term is 20. Find the 15th term. How many terms of this Arithmetic Progression makes the sum 0?

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

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**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,936

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.

May his adventurous soul rest in peace at heaven.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,227

Hi,

Neat work!

SP#594. The angles of a polygon are in Arithmetic Progression. The smallest angle is 120°, and common difference 5°. Find the number of sides.

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,227

Hi,

SP#595. The angles of a nine sided polygon are in an Arithmetic Progression. Which degree measure is always a term of this sequence?

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

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