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#2476 2014-04-14 03:21:35

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1732 is perfect. Excellent!

#1733. Find n so that the n[sup]th[/sup] terms of the following two Arithmetic Progressions are the same.

1, 7, 13, 19, ....... and 100, 95, 90, .........


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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#2477 2014-04-14 03:27:06

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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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#2478 2014-04-14 20:20:00

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1733 is correct. Excellent!

#1734. How many two digit numbers are divisible by 13?


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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#2479 2014-04-14 20:28:55

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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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#2480 2014-04-15 17:01:04

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1734 is correct. Good work!

#1735. The sum of three consecutive terms in an Arithmetic Progression is 6 and their product is - 120. Find the three numbers.


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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#2481 2014-04-15 19:37:24

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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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#2482 2014-04-16 03:18:59

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1735 is perfect. Good work!

#1736. Find the three consecutive terms in an Arithmetic Progression whose sum is 18 and the sum of their squares is 140.


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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#2483 2014-04-16 03:31:58

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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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#2484 2014-04-16 17:41:06

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1736 is correct. Neat work!

#1737. Find the common ratio of the Geometric Progressions:

a) 0.12, 0.24, 0.48, ......

b) 0.004, 0.02, 0.1, ........


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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#2485 2014-04-16 20:28:04

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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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#2486 2014-04-17 17:53:40

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solutions #1737 (a) and #1737 (b) are perfect. Excellent!

#1738. Find the common ratio of the Geometric 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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#2487 2014-04-17 19:48:52

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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

#2488 2014-04-18 16:57:10

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1738 is correct. Excellent!

#1739. Find the common ratios of the Geometric Progressions

(a)

(b)


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.

Offline

#2489 2014-04-18 20:53:10

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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

#2490 2014-04-19 17:09:14

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1739 (both parts) are correct. Excellent!

#1740. Find the 10[sup]th[/sup] term and common ratio of the Geometric 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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#2491 2014-04-19 20:25:26

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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

#2492 2014-04-20 16:21:36

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1740 is correct. Good work!

#1741. If the 4[sup]th[/sup] and 7[sup]th[/sup] terms of a Geometric Progression are 54 and 1458 respectively. Find the Geometric 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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#2493 2014-04-20 19:08:34

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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

#2494 2014-04-21 01:30:24

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1741 is perfect. Splendid!

#1742. Which term of the Geometric Progression

is
?


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.

Offline

#2495 2014-04-21 02:24:52

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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

#2496 2014-04-21 17:26:13

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1742 is correct. Good work!

#1743. If the Geometric Progressions 162, 54, 18, .... and

have their n[sup]th[/sup] term equal, find the value of 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.

Offline

#2497 2014-04-21 21:23:11

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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

#2498 2014-04-22 17:41:24

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1743 is perfect. Excellent!

#1744. The fifth term of a Gometric Progression is 1875. If the first term is 3, find the common ratio.


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.

Offline

#2499 2014-04-22 20:09:17

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,297

Re: Oral puzzles

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

#2500 2014-04-23 17:09:55

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,325

Re: Oral puzzles

Hi bobbym,

The solution #1744 is perfect. Good work!

#1745. The sum of three terms of a Geometric Progression is

and their product is 1. Find the common ratio and the 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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