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#576 2008-01-25 02:10:52
- NullRoot
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- Registered: 2007-11-19
- Posts: 162
Re: 10 second questions
It's a sad day for a mathematician when he believes 3³ = 9...
Trillian: Five to one against and falling. Four to one against and falling Three to one, two, one. Probability factor of one to one. We have normality. I repeat, we have normality. Anything you still cant cope with is therefore your own problem.
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#577 2008-01-29 23:07:50
- Jai Ganesh
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Re: 10 second questions
Well done, mathsyperson!
Neat work!
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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#578 2008-01-30 22:37:53
- Jai Ganesh
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Re: 10 second questions
#616. What is the sum to first ten terms of the series:-
1,4,7,10,......
#617. What is the sum to first five terms of the series:-
1,3,9,27....
#618. What is 10% of 20% of 30% of 100?
#619. What is the curved surface area of a cylinder of radius 7 cms and length 100 cms? (Use pi=22/7)
#620. What is the area of a triangle whose sides are 2 centimeters, 4 centimeters, and 4 centimeters?
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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#579 2008-01-31 00:21:56
- NullRoot
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- Posts: 162
Re: 10 second questions
Last edited by NullRoot (2008-01-31 00:22:49)
Trillian: Five to one against and falling. Four to one against and falling Three to one, two, one. Probability factor of one to one. We have normality. I repeat, we have normality. Anything you still cant cope with is therefore your own problem.
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#580 2008-01-31 17:58:48
- Jai Ganesh
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Re: 10 second questions
Answers #616 to #620.
Excellent, NullRoot! All correct!
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 2008-01-31 18:57:52
- Jai Ganesh
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Re: 10 second questions
#621. What is the difference between simple interest and compound interest on a sum of $1000 at 10% per annum, compounded annually, for a period of 3 years?
#622. If a product is sold for $1300 at 50% loss, what is the cost of the product?
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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#582 2008-01-31 20:02:28
- Jai Ganesh
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Re: 10 second questions
#623. How many zeros does a vigintillion contain?
#624. What percent of 15 is 0.0015?
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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#583 2008-02-01 21:08:53
- JohnnyReinB
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- Registered: 2007-10-08
- Posts: 453
Re: 10 second questions
"There is not a difference between an in-law and an outlaw, except maybe that an outlaw is wanted" 
Nisi Quam Primum, Nequequam
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#584 2008-02-02 01:33:42
- Jai Ganesh
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Re: 10 second questions
Well done, JohnnyReinB!
Answers #621 to #624, all correct!
Keep it up!
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 2008-02-02 01:37:12
- Jai Ganesh
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Re: 10 second questions
#625. What is the sum of the three cube roots of unity?
#626. What is the value of a single discount equal to successive discounts of 20% and 30%?
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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#586 2008-02-02 01:44:44
- JohnnyReinB
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- Registered: 2007-10-08
- Posts: 453
Re: 10 second questions
"There is not a difference between an in-law and an outlaw, except maybe that an outlaw is wanted"
Nisi Quam Primum, Nequequam
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#587 2008-02-02 01:54:59
- Jai Ganesh
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Re: 10 second questions
No, JohnnyReinB, you aren't correct this time!
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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#588 2008-02-02 23:07:49
- Jai Ganesh
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- Registered: 2005-06-28
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Re: 10 second questions
#627. Use 8 eights and any number of mathematical operations and get a 1,000 exactly!
#628. Use 9 nines and any number of mathemitical operations and get a 1,000 exactly!
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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#589 2008-03-31 03:35:42
- AshJones555
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- Registered: 2006-05-15
- Posts: 19
Re: 10 second questions
I'm not sure if this is right because im not sure if saying 8² counts as using one 8 or two but here's my attempt at #627 anyway:
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#590 2008-03-31 05:16:31
- mathsyperson
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Re: 10 second questions
I'd say that 8² counts as using an 8 and a 2, and so isn't allowed (easily fixed by using 8x8 instead though).
I was thinking along the same lines as you, but couldn't quite get it to work. Your answer gave me the nudge I needed though:
Why did the vector cross the road?
It wanted to be normal.
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#591 2008-03-31 19:31:31
- JohnnyReinB
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- Registered: 2007-10-08
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Re: 10 second questions
You could do . It's much simpler.
"There is not a difference between an in-law and an outlaw, except maybe that an outlaw is wanted"
Nisi Quam Primum, Nequequam
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#592 2008-04-10 08:05:38
- Kurre
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- Registered: 2006-07-18
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Re: 10 second questions
Last edited by Kurre (2008-04-10 08:08:45)
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#593 2008-04-16 23:37:34
- Jai Ganesh
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Re: 10 second questions
mathsy, Johnny and kurre are all correct!
But I had the same answer as Johnny in my mind when I posted the question.
#629. What power of 2 is 16777216?
#630. How many times would you write the number 9 when you write the counting numbers from 1 to 1000?
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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#594 2008-04-30 12:36:54
- AshJones555
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- Registered: 2006-05-15
- Posts: 19
Re: 10 second questions
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#595 2008-04-30 13:06:59
- mathsyperson
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- Registered: 2005-06-22
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Re: 10 second questions
Ash, you've miscounted the amount of 9's in 990-998, meaning your final answer is nine short.
There's an easier way though:
Why did the vector cross the road?
It wanted to be normal.
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#596 2008-05-13 18:17:35
- Jai Ganesh
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Re: 10 second questions
Solution to #630:
mathsyperson, you are absolutely right!
#631. How many digits would the thousandth power of 2 contain?
#632. How many digits would the thousandth power of 3 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.
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#597 2008-05-14 17:25:22
- Jai Ganesh
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Re: 10 second questions
#633. What is the value of
3+6+9+12+........87+90?
#634. May 15, 2008 is a Thursday. What day of the week would May 15, 2009 be?
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 2008-05-14 20:01:19
- Jai Ganesh
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- Registered: 2005-06-28
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Re: 10 second questions
#635. What is common between the numbers 625 and 2401?
#636. What is the volume of a sphere of radius 21 cm?
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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#599 2008-05-15 19:12:20
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 48,385
Re: 10 second questions
#637. If a wheel contains 32 evenly spaced spokes, what is the angle in degrees between any two adjacent spokes?
#638. What is the temperature 3273 Kelvin in degrees Fahrenheit?
#639. How many numbers between 50 and 250 (both included) are divisible by the number 3?
#640. Which of the two is smaller in magnitude: The charge of an electron or radius of the nucleus of a Hydrogen atom (both in SI Units)?
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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#600 2008-05-15 20:06:34
- Jai Ganesh
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- Registered: 2005-06-28
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Re: 10 second questions
#641. Make a list of all the distinct prime factors of the number 384.
#642. How many subsets in all does the set {2,4,5,9} have?
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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