Number Sense Forum

webmaster · webmaster

Hello all! I hope you are ready for a new and exciting year in NS. Just to kick you off I have created 2 tests that I need evaluated. Starting this year, math-magic.com will have tests available for purchase. I haven't quite figured out how to do it yet, but I will soon. Also,...

langris5 · Anonymous

Hello, I'm new to this forum, but have used the math-magic.com website before for middle school UIL preparation. I'm now a freshman in high school, and I had a few questions while taking a number sense practice test. How would you guys do the following problems? 1.Approximation - 3...

langris5 · langris5

hey mr.jones, it's quincy here, i have some questions about the problems i came across on the ns test 1. the sum of the coefficients of the 3rd and 5th terms in the expansion of (x-y)^5 is (i don't have the answer for that one) 2. the product of the coefficients of the binomial expansion of (x+2y)^4...

langris5 · langris5

I thought i wasn't going to have another new question until after thanksgiving, but i did...lol, sorry to bother on thanksgiving eve. here it goes... 1. 1^2-2^2+3^2-4^2+5^2= the answer is 15 i check your sequence section, there is a trick to a cubic alternating sequence but there isn't one th...

Anonymous

I am Leo Ramirez. During my coaching career at McAllen High School, my teams won 20 State UIL or TMSCA team championships in Number Sense/Calculator. I have numerous practice tests and workbooks to could assist you in preparing for Number Sense, Calculator Applications, Mathematics, and Science...

webmaster · webmaster

Okay, To everyone: I have finally included everything that I could think of for the site. If you see a problem on a test that is not covered in this website, let me know. My aim is to make the most comprehensive, informative number sense reference that has been made to date. ...

webmaster · webmaster

Okay, That does it for sections. Now all that is left is to add just a few more tricks that have showed up in this forum. I will add those up soon, and then the NS Methods will be complete for this year. If you know of anything I am missing, let me know. Webmaster Tricks I will add: n(n!)+ (n-1)(n-1)!...

webmaster · webmaster

Well, the next section is up. If you find a problem in the advanced algebra section or know of a different way of doing something let me know. Also, if I am missing something, let me know and I will add it. Let me know what you think. Webmaster

webmaster · webmaster

To all: Okay. There is now a new geometry section up on the website. Take a look at it and let me know if there are any mistakes or if I need to add anything to it. I put a section on ellipses in this section instead of making a separate pre-cal section. I will try to finish this...

Penguinzchaseme · Penguinzchaseme

I totally bombed the state test but congrats to all those who did well - good job Sam. Off to train for another year...

webmaster · webmaster

Yes...yes...good job at making it to state. I hope that all of you do well next year. I have FINALLY corrected the pentagonal numbers page and I have FINALLY fixed the pdf files. Whoever it was that emailed me about this you better be very appreciative of the new files because it took a long time...

Penguinzchaseme · Penguinzchaseme

I noticed some errors on the pentagonal numbers page, am I missing something because the examples don't seem to match the forumula also, some questions: ---------------------------------- quickly finding roots? - no Algebra 2 due to freshman status and school won't let me get ahead so I mi...

webmaster · webmaster

Well, Someone needs to tell me how the regional competition went. I am very curious. Were the tests very difficult? Webmaster

Sam · Sam

I was wondering if anyone had a copy of either the 2004 UIL "B" or 2004 District 1 and 2 tests. If someone has one of these and can scan it please reply.

langris5 · langris5

i was just wondering how to find corresponding values from the first quadrants since you said this is necessary before computing, on your website you gave an example: 11B/6 from QIII = B/6 in QI but how do you know this is the corresponding value? Is there some kind of conversion or just purely...

webmaster · webmaster

To all: I have recently updated the website to include a very small trigonometry section. If you can think of any TRICK not on the site please let me know. Like the website says, this is not really a lesson in trigonometry. If you run into problems that deal with basic trig, and you...

webmaster · webmaster

To all: I must apologize for a previous post where I was speaking about finding values to make a triangle into an obtuse or acute triangle. If given 2 sides of a triangle and asked to find a 3rd side such that it is the smallest/largest value to make an acute/obtuse triangle then do the following: F...

langris5 · langris5

Hello Webmaster or Mr.Jones (whichever you prefer), i just got my district test back today, and here are some questions i don't know the tricks to(i am sorry my coach kept the answer sheet and i can't post the right answers for you) 1. if (9^x) / (3^x) = 27^-2, then x= (there's gotta be an easy way to...

Sam · Sam

Hey, I'm new to this forum and I think the website is awesome. I was wondering about two particular questions. First, on the test I have noticed several different series of 1^3-2^3+3^3-4^3+5^3 and so on. I was wondering the formula to such problems. Also, I was wondering w...

langris5 · Anonymous

Why did you create a site on just number sense? Why not add math, calculator, computer science, and science? I am not complaining. I love this site, I am just curious. Why the focus on number sense?

langris5 · langris5

hi mr.jones, i am back from district competiton. well, i was both disappointed and happy, because although i won 1st place in district, but my score was catastrophic(literally), i was so nervous(this is my first time in district) and went super slow...but still made lots of mistakes on the 2nd pg, I d...

webmaster · webmaster

To all: Due to the increased number of questions regarding probability, I recently added a section called Probability & Odds in my website. If you are interested be sure to view: www.math-magic.com/probability.htm Enjoy. If you find any problems or have any questions, p...

langris5 · langris5

I have a real quick question about triangular numbers that i want to ask... 5^3= x^2 -y^2, x and y are negative triangular numbers, then y= answer=-10 8^3= x^2 - y^2 and x, y are positive triangular numbers, then y= answer=28 64=x^2-y^2 and x, y are positive triangular numbers, th...

langris5 · langris5

hi, this is quincy again, i am back with a few more questions....(sorry about didn't make each problem a separate thread earlier, i'll do that from now on) anywayz...here are the problems i am having trouble with: 1. 3/4 + 4/5 + 5/6= ? (mixed number) answer: 2 23/60 (this is #14 on 2003 UIL d...

prophet · prophet

I want to say thanks for putting up this website. I found a lot of great shortcuts for my students here. I had figured a lot of them out on my own but many of the ones you figured out were stated a little clearer than mine or the method was a little easier. I have a question on some of the estimation problems,...

langris5 · langris5

hi, this is quincy again, i came across more unfamiliar questions while practicing.... 1. approxmating#1: 39x15x17(i read all of the approxmation problems on your website...but this one..?) approxmating#2:20x16x18=? 2. how many 2-member committees can be formed...

langris5 · langris5

hi, this is quincy, i am requestion for a trick to the following problem: 1. 458-584+845=? (i don't think this is a reverse...) 2. find the sales tax on a purchase that costs 65.00 with 4% tax (this type of problems appears often on the 2nd column...i saw it many times...couldn't find a trick to...

webmaster · webmaster

Someone the other day asked me about skipping problems. I thought I would give my ideas on that. Skipping problems on the number sense test is not a sin like some teachers teach. If you can do the next problem but not the problem you are on, SKIP IT!!! Afterall, if you get it r...

webmaster · Anonymous

How if given only one leg of a right triangle, you can find the other leg or hypotenuse? Thanks, Jim

webmaster · Anonymous

I don't know if this is a new problem or not, but I don't know how to do it quickly. I can use the regular squaring method, but is there an easier way. 707^2 = 499849. How? Thanks, Jim

Topic		Started By	Replies	Views	Last Post
	Start the year off right! (Preview) Hello all! I hope you are ready for a new and exciting year in NS. Just to kick you off I have created 2 tests that I need evaluated. Starting this year, math-magic.com will have tests available for purchase. I haven't quite figured out how to do it yet, but I will soon. Also,...	webmaster	5	1133	Jan 5, 2005 by Anonymous
	A few questions (Preview) Hello, I'm new to this forum, but have used the math-magic.com website before for middle school UIL preparation. I'm now a freshman in high school, and I had a few questions while taking a number sense practice test. How would you guys do the following problems? 1.Approximation - 3...	Anonymous	2	1018	Jan 4, 2005 by langris5
	question (Preview) hey mr.jones, it's quincy here, i have some questions about the problems i came across on the ns test 1. the sum of the coefficients of the 3rd and 5th terms in the expansion of (x-y)^5 is (i don't have the answer for that one) 2. the product of the coefficients of the binomial expansion of (x+2y)^4...	langris5	6	963	Jan 4, 2005 by Anonymous
	alternating sequence question (Preview) I thought i wasn't going to have another new question until after thanksgiving, but i did...lol, sorry to bother on thanksgiving eve. here it goes... 1. 1^2-2^2+3^2-4^2+5^2= the answer is 15 i check your sequence section, there is a trick to a cubic alternating sequence but there isn't one th...	langris5	4	880	Nov 29, 2004 by webmaster
	2002-2004 High School Number Sense workbook (Preview) I am Leo Ramirez. During my coaching career at McAllen High School, my teams won 20 State UIL or TMSCA team championships in Number Sense/Calculator. I have numerous practice tests and workbooks to could assist you in preparing for Number Sense, Calculator Applications, Mathematics, and Science...	Anonymous	0	847	Oct 26, 2004 by Anonymous
	All Over - Website Completed (Preview) Okay, To everyone: I have finally included everything that I could think of for the site. If you see a problem on a test that is not covered in this website, let me know. My aim is to make the most comprehensive, informative number sense reference that has been made to date. ...	webmaster	0	735	May 23, 2004 by webmaster
	Last Section Up - Calculus (Preview) Okay, That does it for sections. Now all that is left is to add just a few more tricks that have showed up in this forum. I will add those up soon, and then the NS Methods will be complete for this year. If you know of anything I am missing, let me know. Webmaster Tricks I will add: n(n!)+ (n-1)(n-1)!...	webmaster	0	757	May 20, 2004 by webmaster
	Advanced Algebra Section Up (Preview) Well, the next section is up. If you find a problem in the advanced algebra section or know of a different way of doing something let me know. Also, if I am missing something, let me know and I will add it. Let me know what you think. Webmaster	webmaster	0	815	May 19, 2004 by webmaster
	Website Update - Geometry Section Up (Preview) To all: Okay. There is now a new geometry section up on the website. Take a look at it and let me know if there are any mistakes or if I need to add anything to it. I put a section on ellipses in this section instead of making a separate pre-cal section. I will try to finish this...	webmaster	2	949	May 15, 2004 by webmaster
	Congrats (Preview) I totally bombed the state test but congrats to all those who did well - good job Sam. Off to train for another year...	Penguinzchaseme	3	883	May 12, 2004 by webmaster
	Congrats to all (Preview) Yes...yes...good job at making it to state. I hope that all of you do well next year. I have FINALLY corrected the pentagonal numbers page and I have FINALLY fixed the pdf files. Whoever it was that emailed me about this you better be very appreciative of the new files because it took a long time...	webmaster	0	825	May 9, 2004 by webmaster
	Errors?? (Preview) I noticed some errors on the pentagonal numbers page, am I missing something because the examples don't seem to match the forumula also, some questions: ---------------------------------- quickly finding roots? - no Algebra 2 due to freshman status and school won't let me get ahead so I mi...	Penguinzchaseme	16	1233	Apr 29, 2004 by Penguinzchaseme
	Regionals??? ( 1 2 ) (Preview) Well, Someone needs to tell me how the regional competition went. I am very curious. Were the tests very difficult? Webmaster	webmaster	20	2599	Apr 27, 2004 by webmaster
	UIL B and District (Preview) I was wondering if anyone had a copy of either the 2004 UIL "B" or 2004 District 1 and 2 tests. If someone has one of these and can scan it please reply.	Sam	5	1181	Apr 26, 2004 by webmaster
	Question on the new Trig section (Preview) i was just wondering how to find corresponding values from the first quadrants since you said this is necessary before computing, on your website you gave an example: 11B/6 from QIII = B/6 in QI but how do you know this is the corresponding value? Is there some kind of conversion or just purely...	langris5	4	1161	Apr 11, 2004 by webmaster
	Website Update - Trig Section Up (Preview) To all: I have recently updated the website to include a very small trigonometry section. If you can think of any TRICK not on the site please let me know. Like the website says, this is not really a lesson in trigonometry. If you run into problems that deal with basic trig, and you...	webmaster	0	786	Apr 10, 2004 by webmaster
	Corrections for acute/obtuse triangles (Preview) To all: I must apologize for a previous post where I was speaking about finding values to make a triangle into an obtuse or acute triangle. If given 2 sides of a triangle and asked to find a 3rd side such that it is the smallest/largest value to make an acute/obtuse triangle then do the following: F...	webmaster	2	2042	Apr 10, 2004 by langris5
	Questions on District test (Preview) Hello Webmaster or Mr.Jones (whichever you prefer), i just got my district test back today, and here are some questions i don't know the tricks to(i am sorry my coach kept the answer sheet and i can't post the right answers for you) 1. if (9^x) / (3^x) = 27^-2, then x= (there's gotta be an easy way to...	langris5	15	1437	Apr 7, 2004 by webmaster
	Sam (Preview) Hey, I'm new to this forum and I think the website is awesome. I was wondering about two particular questions. First, on the test I have noticed several different series of 1^3-2^3+3^3-4^3+5^3 and so on. I was wondering the formula to such problems. Also, I was wondering w...	Sam	5	1164	Apr 6, 2004 by webmaster
	Why number sense? (Preview) Why did you create a site on just number sense? Why not add math, calculator, computer science, and science? I am not complaining. I love this site, I am just curious. Why the focus on number sense?	Anonymous	2	998	Apr 6, 2004 by langris5
	My distric results & thanks (Preview) hi mr.jones, i am back from district competiton. well, i was both disappointed and happy, because although i won 1st place in district, but my score was catastrophic(literally), i was so nervous(this is my first time in district) and went super slow...but still made lots of mistakes on the 2nd pg, I d...	langris5	1	936	Apr 4, 2004 by webmaster
	Website Update - Probability Section Up (Preview) To all: Due to the increased number of questions regarding probability, I recently added a section called Probability & Odds in my website. If you are interested be sure to view: www.math-magic.com/probability.htm Enjoy. If you find any problems or have any questions, p...	webmaster	0	942	Apr 4, 2004 by webmaster
	Triangular numbers (Preview) I have a real quick question about triangular numbers that i want to ask... 5^3= x^2 -y^2, x and y are negative triangular numbers, then y= answer=-10 8^3= x^2 - y^2 and x, y are positive triangular numbers, then y= answer=28 64=x^2-y^2 and x, y are positive triangular numbers, th...	langris5	1	1158	Apr 1, 2004 by webmaster
	a few more questions (Preview) hi, this is quincy again, i am back with a few more questions....(sorry about didn't make each problem a separate thread earlier, i'll do that from now on) anywayz...here are the problems i am having trouble with: 1. 3/4 + 4/5 + 5/6= ? (mixed number) answer: 2 23/60 (this is #14 on 2003 UIL d...	langris5	13	1336	Apr 1, 2004 by webmaster
	estimation problems (Preview) I want to say thanks for putting up this website. I found a lot of great shortcuts for my students here. I had figured a lot of them out on my own but many of the ones you figured out were stated a little clearer than mine or the method was a little easier. I have a question on some of the estimation problems,...	prophet	3	1256	Mar 31, 2004 by langris5
	requesting for more shortcuts... (Preview) hi, this is quincy again, i came across more unfamiliar questions while practicing.... 1. approxmating#1: 39x15x17(i read all of the approxmation problems on your website...but this one..?) approxmating#2:20x16x18=? 2. how many 2-member committees can be formed...	langris5	12	1302	Mar 20, 2004 by webmaster
	Requesting for a shortcut (Preview) hi, this is quincy, i am requestion for a trick to the following problem: 1. 458-584+845=? (i don't think this is a reverse...) 2. find the sales tax on a purchase that costs 65.00 with 4% tax (this type of problems appears often on the 2nd column...i saw it many times...couldn't find a trick to...	langris5	4	1209	Mar 16, 2004 by webmaster
	Skipping problems... (Preview) Someone the other day asked me about skipping problems. I thought I would give my ideas on that. Skipping problems on the number sense test is not a sin like some teachers teach. If you can do the next problem but not the problem you are on, SKIP IT!!! Afterall, if you get it r...	webmaster	0	852	Feb 27, 2004 by webmaster
	Right Triangles???? (Preview) How if given only one leg of a right triangle, you can find the other leg or hypotenuse? Thanks, Jim	Anonymous	1	921	Feb 22, 2004 by webmaster
	How do you square 707? (Preview) I don't know if this is a new problem or not, but I don't know how to do it quickly. I can use the regular squaring method, but is there an easier way. 707^2 = 499849. How? Thanks, Jim	Anonymous	1	820	Feb 20, 2004 by webmaster
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