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#6276 2019-03-24 01:01:09
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
.
#4397. The sum of all interior angles of a regular polygon is 1440°. Find the number of sides of the polygon.
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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#6277 2019-03-25 00:09:23
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
#4398. Each exterior angle of a regular polygon is 30 degrees. Find the number of its sides.
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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#6278 2019-03-26 00:43:12
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
#4399. Find the diagonals in a regular octagon. Number of diagonals in a regular polygon with n sides
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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#6279 2019-03-26 21:10:20
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
.
#4400. Find the number of sides of a regular polygon whose interior angle measures
.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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#6280 2019-03-26 23:10:12
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
#4401. Number of diagonals in a regular polygon with n sides is
. A polygon has 54 diagonals. Find the number of sides in the polygon.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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#6281 2019-03-27 15:50:53
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
#4402. If the difference between the (x,2) and (3,4) is 2, 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.
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#6282 2019-03-27 20:17:04
- 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.
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#6283 2019-03-27 21:54:55
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
Well tried, Monox D. I-Fly!
#4403. Find the distance between the points A(-6,-1) and B(-6,11).
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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#6284 2019-03-28 13:16:08
- 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.
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#6285 2019-03-28 14:16:02
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
.
The solution #4403 is correct. Neat work, Monox D. I-Fly!
#4404. Prove that the points A(1,1), B(-2.7), and C(3,-3) are collinear with the help of distance formula.
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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#6286 2019-03-29 16:48:55
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
#4405. Find the remainder when
is divided by (x - 2).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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#6287 2019-03-30 00:36:16
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
.
#4406. Find the remainder when
is divided by (x + 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.
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#6288 2019-03-30 22:16:34
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
.
#4407. The price of sugar is increased by 25%. If a family wants to keep its expenses on sugar unaltered, then the family would have to reduce the consumption of sugar by how many percent?
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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#6289 2019-03-31 20:24:31
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
#4408. The sum of five numbers is 555. The average of first two numbers is 75 and the third number is 115. What is the average of the last two 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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#6290 2019-04-01 00:46:47
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
.
#4409. The average age of 30 girls is 13 years. The average of first 18 girls is 15 years. Find the average age of remaining 12 girls.
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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#6291 2019-04-01 14:13:38
- 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.
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#6292 2019-04-01 16:31:08
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
The solution #4409 is correct. Excellent, Monox D. I-Fly!
#4410. The age of 8 persons is increased by 2 years, when one of them, whose age is 24 years, is replaced by a new person. Find the age of the new person.
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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#6293 2019-04-02 01:05:06
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
#4411. The average of eight men is increased by 2 years when two of them whose ages are 21 years and 23 years are replaced by two new men. Find the average age of the two new men.
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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#6294 2019-04-03 01:10:44
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
#4412. Is (x - 2) a factor 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.
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#6295 2019-04-03 13:55:23
- 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
#6296 2019-04-03 14:24:19
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
.
The solution #4412 is correct. Neat work, Monox D. I-Fly!
#4413. Find the product of zeroes of the polynomial
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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#6297 2019-04-04 00:32:24
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
.
#4414. Find 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.
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#6298 2019-04-05 14:50:33
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
.
#4415. The sum of two numbers is 40 and their difference is 4. Find the ratio of the 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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#6299 2019-04-05 15:30:45
- 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
#6300 2019-04-05 16:29:16
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,423
Re: Oral puzzles
Hi,
.
The solution #4415 is correct. Neat work,Monox D. I-Fly!
#4416. The mean of 50 observations was 36. It was later found that an observation 48 was wrongly taken as 23. Find the corrected (new) mean.
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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