Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
#4926 2016-06-15 17:21:59
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solution #3039 (two parts) is perfect. Excellent, bobbym!
#3040. A boat goes 30 km upstream and 44 km downstream in 10 hours. In 13 hours, it can go 40 km upstream and 55 km downstream. Determine the speed of the stream and that of the boat in still water.
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
#4927 2016-06-15 19:33:14
- 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
#4928 2016-06-16 17:32:23
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solutions in #3040 are correct. Good work, bobbym!
#3041. 2 men and 7 boys can do a piece of work in 4 days. The same work is done in 3 days by 4 men and 4 boys. How long respectively would it take for one man and one boy to do it?
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
#4929 2016-06-16 18:11:31
- 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
#4930 2016-06-17 00:03:36
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solutions in #3041 are correct. Neat work, bobbym!
#3042. Solve for x and y:
152x - 378y = -74 and
-378x + 152y = -604.
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
#4931 2016-06-17 02:06:51
- 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
#4932 2016-06-17 18:09:52
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solution set in #3042 is correct. Excellent, bobbym!
#3043. A boat covers 32 km upstream and 36 km downstream in 7 hours. Also, it covers 40 km upstream and 48 km downstream in 9 hours. Find the speed of the boat in still water and that of the stream.
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
#4933 2016-06-17 18:26:18
- 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
#4934 2016-06-18 17:38:36
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solutions in #3043 are correct. Excellent, bobbym!
#3044. The angle of elevation of the top of a tower from a point on the ground, which is 30 meter away from the top of a tower of height
meter is _______.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
#4935 2016-06-19 03:50:48
- 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
#4936 2016-06-19 16:53:50
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solution #3044 is correct. Good work, bobbym!
#3045. A bridge, in the shape of a straight path, across a river, makes an angle of 60 degrees with the width of the river. If the length of the bridge is 100 meters, then the width of the river is _______.
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
#4937 2016-06-19 17:20:09
- 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
#4938 2016-06-20 00:47:57
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
#3046. The ratio of the length of a tree and its shadow is
The angle of the Sun's evevation is _______.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
#4939 2016-06-20 00:53:26
- 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
#4940 2016-06-20 16:38:48
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solution #3046 is correct. Good work, bobbym!
#3047. A pole 6 meter high casts a shadow
meter long on the ground, then the Sun's elevation is ______ degrees.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
#4941 2016-06-20 17:12:49
- 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
#4942 2016-06-20 22:13:45
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solution #3047 is correct. Excellent, bobbym!
#3048. The angle of elevation of the top of a tower from a point on the ground 30 meters away from the top of the tower is 30 degrees. Find the height of the tower.
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
#4943 2016-06-21 00:15:02
- 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.
Offline
#4944 2016-06-21 16:34:21
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solution #3048 is correct. Good work, bobbym!
#3049. The height of the tower in 100 meters. When the angle of elevation of the Sun is 30 degrees, then the shadow of the tower 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.
Offline
#4945 2016-06-21 16:57:32
- 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
#4946 2016-06-22 17:26:00
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solution #3049 is correct. Excellent, bobbym!
#3050. The angle of elevation of the top of a tower at a distance of 500 m from the foot is 30 degrees. Find the height of the tower.
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
#4947 2016-06-22 18:02:10
- 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
#4948 2016-06-23 00:33:38
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solution #3050 is correct. Neat work, bobbym!
#3051. A kite is flying at a height of 75 m from the level ground, attached to a string inclined at 60 degrees to the horizontal. Then the length of the string is _________.
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
#4949 2016-06-23 00:52:12
- 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
#4950 2016-06-23 15:32:49
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,385
Re: Oral puzzles
Hi;
The solution #3051 is correct. Good work, bobbym!
#3052. If the length of the shadow of a tower is
times its height, then the angle of elevation of the Sun is _______.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