# Math Is Fun Forum

Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

You are not logged in.

## #1126 2021-01-31 15:26:25

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Neat work!

SP#634. Write the algebraic form of the Arithmetic Progression 1, 4,7, 10, .... Is 100 a term of the sequence?

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.

Online

## #1127 2021-02-01 07:05:54

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1128 2021-02-01 16:51:13

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Excellent!

SP#635.

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.

Online

## #1129 2021-02-02 05:56:29

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1130 2021-02-02 15:01:48

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Good work!

SP#636. The 7th term of an Arithmetic Progression is 20 and its 13th term is 32. Find the first four 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.

Online

## #1131 2021-02-03 03:35:14

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1132 2021-02-03 15:16:17

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Neat work!

SP#637. Find the 10th term of the Arithmetic Progression 4, 9, 14, ....., 254.

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.

Online

## #1133 2021-02-04 05:44:13

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1134 2021-02-04 15:48:35

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Well done!

SP#638. Find the middle term of the Arithmetic Progression 6, 13, 20, ...., 216.

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.

Online

## #1135 2021-02-05 04:31:30

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1136 2021-02-05 14:58:30

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Neat work!

SP#639. Find the middle term of the Arithmetic Progression 213, 205, 197, ...., 37.

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.

Online

## #1137 2021-02-07 03:32:05

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1138 2021-02-07 15:45:52

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Neat work!

SP# 640. How many terms of the Arithmetic Progression 27, 24, 21, ... should be taken so that their sum is zero?

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.

Online

## #1139 2021-02-08 05:35:41

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1140 2021-02-08 14:45:53

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Neat work!

SP#641. Find the sum of the first 25 terms of an Arithmetic Progression whose nth term is given by

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.

Online

## #1141 2021-02-09 03:55:04

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1142 2021-02-09 15:42:31

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Excellent!

SP#642. Find the sum of all three digit natural numbers which are multiples of 11.

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.

Online

## #1143 2021-02-10 04:24:52

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1144 2021-02-10 15:30:43

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Excellent!

SP#643. The 14th term of an Arithmetic Progression is twice its 8th term. If its 6th term is -8, then find the sum of its first 20 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.

Online

## #1145 2021-02-11 04:53:02

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1146 2021-02-11 15:05:43

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Excellent!

SP#644. The 13th term of an Arithmetic Progression is four times its 3rd term. If its fifth term is 16, then find the sum of its first ten 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.

Online

## #1147 2021-02-12 03:46:58

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1148 2021-02-12 15:22:23

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Excellent!

SP#645. Which term of the Arithmetic Progression 3, 14, 25, 36, .. will be 99 more than its 25th 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.

Online

## #1149 2021-02-13 04:22:36

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Series and Progressions

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

Offline

## #1150 2021-02-13 15:37:55

ganesh
Registered: 2005-06-28
Posts: 33,174

### Re: Series and Progressions

Hi,

Neat work!

SP#646. Find the value of the middle term of the Arithmetic Progression -6, -2, 2, ...., 58.

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.

Online