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#2351 2012-12-15 21:01:15
- bobbym
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Re: Oral puzzles
Hi;
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#2352 2012-12-16 18:10:30
- ganesh
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Re: Oral puzzles
Hi bobbym,
The solution #1674 is correct. Neat work!
#1675. Find the sum of all natural numbers less than 200 which are divisible by 5.
Character is who you are when no one is looking.
#2353 2012-12-16 20:17:51
- bobbym
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Re: Oral puzzles
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#2354 2012-12-17 18:26:18
- ganesh
- Moderator
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Re: Oral puzzles
Hi bobbym,
The solution #1675 is perfect. Good work!
#1676. Find the sum of all the natural numbers between 200 and 300 which are divisible by 4.
Character is who you are when no one is looking.
#2355 2012-12-17 20:54:01
- bobbym
- Administrator
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Re: Oral puzzles
Hi;
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#2356 2012-12-18 17:29:40
- ganesh
- Moderator
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Re: Oral puzzles
Hi bobbym,
The solution #1676 is perfect. Neat work!
#1677. Find the Arithmetic Progression whose sum to n terms is 2n2 + 2. (Find the values of the AP)
Character is who you are when no one is looking.
#2357 2012-12-18 20:28:37
- bobbym
- Administrator
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Re: Oral puzzles
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#2358 2012-12-19 19:07:26
- ganesh
- Moderator
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Re: Oral puzzles
Hi bobbym,
#1678. The houses of a row are numbered consecutively from 1 to 49. Show that there is a value of x such that the sum of the numbers of the houses preceding the house numbered x is equal to the sum of the numbers of the following it. Find this value of x.
Character is who you are when no one is looking.
#2359 2012-12-19 21:04:48
- bobbym
- Administrator
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Re: Oral puzzles
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#2360 2012-12-20 17:46:11
- ganesh
- Moderator
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Re: Oral puzzles
Hi bobbym,
The solution #1678 is correct. Marvelous!
#1679. Find a30 - a20 for the Arithmetic Progression : a, a + d, a + 2d, a + 3d, ......
Character is who you are when no one is looking.
#2361 2012-12-20 19:23:43
- bobbym
- Administrator
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Re: Oral puzzles
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#2362 2012-12-21 17:47:43
- ganesh
- Moderator
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Re: Oral puzzles
Hi bobbym,
The solution #1679 is correct. Good work!
#1680. Two Arithmetic Progressions have the same common difference. The difference between their 100th term is 111222333. What is the difference between their millionth terms?
Character is who you are when no one is looking.
#2363 2012-12-21 20:12:17
- anonimnystefy
- Real Member
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Re: Oral puzzles
Hi ganesh
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón
#2364 2012-12-21 20:35:55
- bobbym
- Administrator
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Re: Oral puzzles
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#2365 2012-12-21 22:58:11
- ganesh
- Moderator
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Re: Oral puzzles
Hi anonimnystefy and bobbym,
The solution #1680 is correct. Well done!
#1681. Which term of the Arithmetic Progression 21, 18, 15, ..... is 0?
Character is who you are when no one is looking.
#2366 2012-12-21 23:01:05
- bobbym
- Administrator
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Re: Oral puzzles
Hi;
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#2367 2012-12-22 05:38:06
- anonimnystefy
- Real Member
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Re: Oral puzzles
Hi ganesh
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón
#2368 2012-12-22 17:52:15
- ganesh
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Re: Oral puzzles
Hi bobbym and anonimnystefy,
The solution #1681 is correct. Neat work!
#1682. Find the 30th term of the Arithmetic Progression 10, 7, 4, ......
Character is who you are when no one is looking.
#2369 2012-12-22 21:48:22
- bobbym
- Administrator
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Re: Oral puzzles
Hi;
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#2370 2012-12-23 18:21:13
- ganesh
- Moderator
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Re: Oral puzzles
Hi bobbym,
The solution #1682 is correct. Neat work!
#1683. If a = -18, n = 10, an = 0, find d.
Character is who you are when no one is looking.
#2371 2012-12-23 21:01:50
- bobbym
- Administrator
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Re: Oral puzzles
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#2372 2012-12-23 22:16:25
- anonimnystefy
- Real Member
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Re: Oral puzzles
Hi ganesh
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón
#2373 2012-12-24 17:51:07
- ganesh
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Re: Oral puzzles
Hi bobbym and anonimnystefy,
The solution #1683 is perfect. Neat job!
#1684. If a = 3.5, d = 0, n = 105, find an.
Character is who you are when no one is looking.
#2374 2012-12-24 18:13:29
- bobbym
- Administrator
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Re: Oral puzzles
Hi;
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#2375 2012-12-25 18:12:03
- ganesh
- Moderator
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Re: Oral puzzles
Hi bobbym,
The solution #1684 is correct. Good work!
#1685. Find the number of odd numbers between 0 and 50.
Character is who you are when no one is looking.