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#2551 2014-05-06 20:08:48

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

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#2552 2014-05-07 17:05:18

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi bobbym,

The solution #1767 is perfect. Excellent!

#1768. Find the sum of the following series 1 + 2 + 3 + ........ + 45.


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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#2553 2014-05-07 21:20:54

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

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#2554 2014-05-08 17:08:37

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi bobbym,

The solution #1768 is correct. Good work!

#1769. Find the sum of the following series : 16² + 17² + 18² + ......... + 25².


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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#2555 2014-05-08 21:05:58

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Offline

#2556 2014-05-09 17:13:38

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi bobbym,

The solution #1769 is correct. Marvelous!

#1770. Find the sum of the following series : 2 + 4 + 6 + 8 + ......... + 100.


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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#2557 2014-05-09 20:45:56

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Offline

#2558 2014-05-10 03:31:41

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi bobbym,

The solution #1770 is perfect. Good work!

#1771. Find the sum of the following series : 7 + 14 + 21 + ........ + 490.


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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#2559 2014-05-10 03:34:50

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,015

Re: Oral puzzles

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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#2560 2014-05-10 05:25:01

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Offline

#2561 2014-05-11 00:47:37

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi anonimnystefy and bobbym,

The solution #1771 is correct. Excellent, anonimnystefy and bobbym!

#1772. Find the sum of the following series: 16³ + 17³ + 18³ + ....... + 35³.


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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#2562 2014-05-11 02:55:20

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Offline

#2563 2014-05-11 16:08:39

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi bobbym,

The solution #1772 is correct. Marvelous!

#1773. Find the value of k if 1³ + 2³ + 3³ + ...... + k³ = 2025.


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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#2564 2014-05-11 16:12:26

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Offline

#2565 2014-05-11 18:22:13

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi bobbym,

The solution #1773 is perfect. Excellent!

#1774. Find the sum of the following series : 5² + 7² + 9² + ..... + 39².


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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#2566 2014-05-11 19:18:02

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Offline

#2567 2014-05-12 16:44:06

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi bobbym,

The solution #1774 is correct. Excellent!

#1775. If 1 + 2 + 3 + ...... + p = 171 then find 1³ + 2³ + 3³ + ..... + p³.


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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#2568 2014-05-12 20:24:42

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Offline

#2569 2014-05-13 15:32:43

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi bobbym,

The solution #1775 is correct. Brilliant!

#1776. If 1³ + 2³  + 3³  + .... + 8281, then find the value of 1 + 2 + 3 + ... + k.


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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#2570 2014-05-13 19:12:32

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Offline

#2571 2014-05-14 16:51:27

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi bobbym,

The solution #1776 is perfect. Excellent!

#1777. Find the total area of 12 quares whose edges are 12 cm, 13 cm, 14 cm, .... and 23 cm.


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

#2572 2014-05-14 19:19:39

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Offline

#2573 2014-05-15 03:53:56

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi bobbym,

The solution #1777 is perfect. Neat work!

#1778. Find the total volume of 15 cubes whose sides are 16 cm, 17 cm, 18 cm, .....30 cm.


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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#2574 2014-05-15 05:34:49

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 103,832

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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Offline

#2575 2014-05-15 16:38:56

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,794

Re: Oral puzzles

Hi bobbym,

The solution #1778 is correct! Stupendous!

#1779. Find the 8[sup]th[/sup] term of the sequence 1, 1, 2, 3, 5, 8, ....


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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