Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
#5576 2017-10-14 14:47:44
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3817. A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is jack, queen, or king.
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
#5577 2017-10-15 16:17:29
- Monox D. I-Fly
- Member
- From: Indonesia
- Registered: 2015-12-02
- Posts: 2,000
Re: Oral puzzles
Last edited by Monox D. I-Fly (2017-10-15 16:18:23)
Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.
Offline
#5578 2017-10-15 21:32:25
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
The solution #3817 is correct. Neat work, Monox D. I-Fly!
#3818. A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is neither a red card nor a queen.
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
#5579 2017-10-16 01:05:31
- Monox D. I-Fly
- Member
- From: Indonesia
- Registered: 2015-12-02
- Posts: 2,000
Re: Oral puzzles
Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.
Offline
#5580 2017-10-16 03:00:42
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
Good attempt, Monox D. I-Fly!
#3819. A 16 meter deep well with diameter 3.5 meter is dug up and the earth from it is spread evenly to form a platform 27.5 meter by 7 meter. Find the height of the platform,
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
#5581 2017-10-18 14:11:12
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3820. Solve:
3x + y + 1 = 0,
2x - 3y + 8 = 0.
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
#5582 2017-10-21 01:20:11
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3821. Solve:
2x + y - 3 = 0,
2x - 3y - 7 = 0.
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
#5583 2017-10-21 12:54:13
- Monox D. I-Fly
- Member
- From: Indonesia
- Registered: 2015-12-02
- Posts: 2,000
Re: Oral puzzles
Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.
Offline
#5584 2017-10-21 14:17:56
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
The solution set in #3821 is correct. Good work, Monox D. I-Fly!
#3822. Solve:
x + y = 4,
2x - 3y = 3.
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
#5585 2017-10-22 01:17:12
- Monox D. I-Fly
- Member
- From: Indonesia
- Registered: 2015-12-02
- Posts: 2,000
Re: Oral puzzles
Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.
Offline
#5586 2017-10-22 03:45:10
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
The solution #3822 is correct. Neat work, Monox D. I-Fly!
#3823. Solve:
2x + 3y = 4,
x - y + 3 = 0.
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
#5587 2017-10-22 11:25:36
- Monox D. I-Fly
- Member
- From: Indonesia
- Registered: 2015-12-02
- Posts: 2,000
Re: Oral puzzles
Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.
Offline
#5588 2017-10-22 12:17:23
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
The solution set in #3823 is correct. Good work, Monox D. I-Fly!
#3824. Solve:
2x - 3y + 13 = 0,
3x - 2y + 12 = 0.
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
#5589 2017-10-28 13:44:15
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3825. Solve:
2x + 3y + 5 = 0,
3x - 2y - 12 = 0.
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
#5590 2017-10-31 14:24:19
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3826. Solve:
3x - 7y + 10 = 0,
y - 2x - 3 = 0.
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
#5591 2017-11-02 00:31:33
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3827. Solve:
x + 2y + z = 7,
x + 3z = 11,
2x - 3y = 1.
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
#5592 2017-11-04 00:43:28
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3828. Solve:
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
#5593 2017-11-07 02:37:25
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3829. Solve:
11x + 15y + 23 = 0,
7x - 2y - 20 = 0.
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
#5594 2017-11-09 02:14:32
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3830. Solve:
,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
#5595 2017-11-11 00:29:16
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3831. Find the mean of first 'n' odd natural 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
#5596 2017-11-15 08:27:13
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3832. If the mean of first n odd numbers is
, find the value of n.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
#5597 2017-11-17 14:57:25
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
#3833. If the Arithmetic Mean of x, x + 3, x + 6, x + 9, and x + 12 is 10, what is the value of x?
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
#5598 2017-11-17 18:32:30
- Monox D. I-Fly
- Member
- From: Indonesia
- Registered: 2015-12-02
- Posts: 2,000
Re: Oral puzzles
Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.
Offline
#5599 2017-11-17 18:56:09
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,427
Re: Oral puzzles
Hi,
The solution #3833 is correct. Neat work, Monox D. I-Fly!
#3834. If the median of the data : 24, 25, 26, x + 2, x + 3, 30, 31, 34 is 27.5, then find the value of x.
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
#5600 2017-11-17 19:53:01
- Monox D. I-Fly
- Member
- From: Indonesia
- Registered: 2015-12-02
- Posts: 2,000
Re: Oral puzzles
Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.
Offline