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#576 2011-02-04 01:17:58
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,422
Re: Oral puzzles
Hi bobbym, gAr, and Howardroark,
The solution to 904 is correct, gAr, and Howardroark. Good work!
The solution is
, bobbym.#905. What is the sum of first 100 odd natural numbers?
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#577 2011-02-04 01:20:37
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#578 2011-02-04 01:50:29
- gAr
- Member
- Registered: 2011-01-09
- Posts: 3,482
Re: Oral puzzles
Hi,
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
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#579 2011-02-04 20:23:16
- Howardroark
- Member
- Registered: 2010-10-10
- Posts: 382
Re: Oral puzzles
Hi ganesh,
I come from a civilization which has given the world the number 0..
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#580 2011-02-05 00:52:09
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,422
Re: Oral puzzles
Hi bobbym, gAr, and Howardroark,
The solution 905 is 10,000. Well done, bobbym, and Howardroark! Keep trying, gAr!
#906. Two dice are rolled. What is the probability of one or both dice show 5?
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#581 2011-02-05 01:13:17
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#582 2011-02-05 01:27:11
- gAr
- Member
- Registered: 2011-01-09
- Posts: 3,482
Re: Oral puzzles
Hi ganesh,
For #905, I realized that after submitting, I considered odd numbers among first 100 natural numbers:)
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
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#583 2011-02-05 04:46:51
- Howardroark
- Member
- Registered: 2010-10-10
- Posts: 382
Re: Oral puzzles
Hi ganesh,
I come from a civilization which has given the world the number 0..
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#584 2011-02-06 01:04:02
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,422
Re: Oral puzzles
Hi bobbym, gAr, and Howardroark
The solution to 906 is correct. Good work!
#907. Simplify:
.It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#585 2011-02-06 01:08:02
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#586 2011-02-06 01:28:53
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,422
Re: Oral puzzles
Hi bobbym,
The solution to 907 is correct. Well done!
#908. What is the unit digit in the product (684 x 759 x 413 x 676)?
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#587 2011-02-06 01:48:19
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#588 2011-02-06 05:33:26
- Howardroark
- Member
- Registered: 2010-10-10
- Posts: 382
Re: Oral puzzles
Hi ganesh,
I come from a civilization which has given the world the number 0..
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#589 2011-02-06 05:36:59
- Howardroark
- Member
- Registered: 2010-10-10
- Posts: 382
Re: Oral puzzles
Hi,
I come from a civilization which has given the world the number 0..
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#590 2011-02-07 00:51:14
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,422
Re: Oral puzzles
Hi bobbym and Howardroark,
The solution(s) by bobbym (908) and Howardroark (907 and 908) is/are correct. Brilliant!
#909. What least number must be subtracted from 1672 to obtain a number which is completely divisible by 17?
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#591 2011-02-07 00:59:07
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
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#592 2011-02-08 00:51:29
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,422
Re: Oral puzzles
Hi bobbym,
The solution 909 is correct. Well done!
#910. Show that 52563744 is divisible by 24.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#593 2011-02-08 01:33:53
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#594 2011-02-09 00:51:29
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,422
Re: Oral puzzles
Hi bobbym,
The solution 910 is perfect. Good reasoning!
#911. What is the unit digit in
?It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#595 2011-02-09 01:04:27
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#596 2011-02-09 01:09:10
- gAr
- Member
- Registered: 2011-01-09
- Posts: 3,482
Re: Oral puzzles
Hi ganesh,
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
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#597 2011-02-10 01:03:54
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,422
Re: Oral puzzles
Hi bobbym and gAr,
The solution 911 is correct. Well done!
#912. How many natural numbers between 17 and 80 are divisible by 6?
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#598 2011-02-10 01:18:36
- gAr
- Member
- Registered: 2011-01-09
- Posts: 3,482
Re: Oral puzzles
Hi,
[
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
Offline
#599 2011-02-10 02:58:31
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
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.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#600 2011-02-11 00:40:37
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,422
Re: Oral puzzles
Hi gAr and bobbym,
The solution is 11; Well done, bobbym; Keep trying, gAr!
#913. Find the sum : (2 + 2[sup]2[/sup] + 2[sup]3[/sup] + 2[sup]4[/sup] + ..... + 2[sup]10[/sup]).
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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