Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
#3701 2012-04-03 01:37:34
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: 10 second questions
Hi ganesh
I thought there was a line above all the decimals.
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.
Offline
#3702 2012-04-03 17:25:50
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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
#3703 2012-04-03 20:57:29
- Denominator
- Member
- Registered: 2009-11-23
- Posts: 220
Re: 10 second questions
Hey ganesh,
Offline
#3704 2012-04-04 21:20:32
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,421
Re: 10 second questions
Hi anonimnystefy, bobbym, and Denominator,
The solution #3074 is correct. Excellent!
#3975. Approximately how many digits would 100! (100 factorial) contain?
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.
Offline
#3705 2012-04-04 21:24:15
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: 10 second questions
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.
Offline
#3706 2012-04-04 21:25:37
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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
#3707 2012-04-04 22:30:20
- Denominator
- Member
- Registered: 2009-11-23
- Posts: 220
Re: 10 second questions
Hey,
Sorry, I don't know how to solve this, D:
Can you tell me the solution?
Thanks
Offline
#3708 2012-04-04 22:31:49
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi Denominator;
You could use Stirlings formula, if you have not already seen the answer.
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
#3709 2012-04-09 00:54:29
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,421
Re: 10 second questions
Hi anonimnystefy, bobbym, and Denominator,
The solution 100 ! is approximately 9.33 x 10^157, therefore it contains 158 digits.
Excellent, anonimnystefy and bobbym!
#3976. In a mixture of 60 liters, the ratio of milk and water is 2 : 1. What amount of water must be added to make the ratio
1 : 2?
#3977. A's money is to B's money is 4 : 5 and B's money is to C's money is 2 : 3. If A has $800, then what C has?
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.
Offline
#3710 2012-04-09 00:59:41
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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
#3711 2012-04-09 01:26:09
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: 10 second questions
Hi ganesh
Last edited by anonimnystefy (2012-04-09 01:26:54)
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.
Offline
#3712 2012-04-09 17:14:02
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,421
Re: 10 second questions
Hi bobbym and anonimnystefy,
The solutions #3976 and #3977 are correct. Marvelous!
#3978. 15 liters of mixture contains 20% alcohol and the rest water. If 3 liters of water be mixed in it, what is the percentage of alcohol in the new mixture?
#3979. Victor got thrice as many marks in Mathematics as in English. The proportion of his marks in Mathematics and History is 4:3. If his total marks in Mathematics, English, and History are 250, what are his marks in English?
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.
Offline
#3713 2012-04-09 19:06:13
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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
#3714 2012-04-10 00:26:06
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: 10 second questions
Hi ganesh
Last edited by anonimnystefy (2012-04-10 21:46:34)
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.
Offline
#3715 2012-04-10 21:27:26
- Denominator
- Member
- Registered: 2009-11-23
- Posts: 220
Re: 10 second questions
Hey
Offline
#3716 2012-04-10 22:31:29
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,421
Re: 10 second questions
Hi bobbym, anonimnystefy, and Denominator,
The solutions #3978 and #3979 are correct. Keep it up!
#3980. A piece of wire of 78 centimeters long is bent in the form of an isosceles triangle. If the ratio of one of the equal sides to the base is 5 : 3, then what is the length of the base in centimeters?
#3981. A circle and a square have same area. What is the ratio of the side of the square and the radius of the circle?
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.
Offline
#3717 2012-04-10 22:36:54
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: 10 second questions
hi ganesh
Last edited by anonimnystefy (2012-04-10 22:37:20)
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.
Offline
#3718 2012-04-10 23:03:59
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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
#3719 2012-04-11 17:19:13
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,421
Re: 10 second questions
Hi anonimnystefy and bobbym,
The solutions #3980 and #3981 are correct. Marvelous!
#3982. Three friends divide $624 among themselves in the ratio
. What is the share of the third friend?#3983. A bag contains 25 cents, 10 cents, and 5 cents coins in the ratio 1 : 2 : 3. If their total value is $30, what is the number of 5 cent coins?
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.
Offline
#3720 2012-04-11 19:52:27
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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
#3721 2012-04-12 16:53:27
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,421
Re: 10 second questions
Hi bobbym,
The solutions #3982 and #3983 are correct. Neat job!
#3984. The ratio of A's age to B's age is equal to 4 : 3. A would be 26 years old after 6 years. How old is B now?
#3985. Two numbers are in the ratio 3 : 5. If 9 is subtracted from each number, they are in the ratio 12 : 23. What is the first number?
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.
Offline
#3722 2012-04-12 17:00:57
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: 10 second questions
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.
Offline
#3723 2012-04-12 18:07:18
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
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
#3724 2012-04-12 23:20:25
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,421
Re: 10 second questions
Hi anonimnystefy and bobbym,
The solutions #3984 and #3985 are correct. Brilliant!
#3986. If
, then what is the value of ?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.
Offline
#3725 2012-04-12 23:25:33
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: 10 second questions
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.
Offline