Number Sense Forum

webmaster · webmaster

To all: I only have 2 requests: #1 -> Make a new thread for every different set of problems you have. If you have 5 questions you can put them in one thread, but after they are answered and you have additional questions (not pertaining to what was just answered), please make a new thread. ...

webmaster · webmaster

To all: Please note that you can find out a lot of information just by visiting: www.math-magic.com. If there is something you can't find on there, you can either email me (webmaster@math-magic.com) or post a thread in this forum. Webmaster

Anonymous

The determinant of [ 1 3k ] =6. K= ??? [4 12 ]

webmaster · webmaster

Here are 3 practice tests! For ease of downloading, I made them all into .zip files although every one of the three are different file formats. By the way guys, thanks for the ANSWER KEYS!!!!!!!!!!!! At least Sam gave one. Anyway...enjoy! Sam's Test (The #1 scorer in the state on t...

Anonymous

Hi, I'm a 6th grader in Dallas, Texas, and I was wondering how to get better scores in number sense. Currently, I'm not getting very good scores on my practice tests (70 - 90), while other people are getting scores over 130. I've looked at a lot of different websites like mathninja.org, and I've found pa...

mrs05 · mrs05

Hi, I haven't checked math-magic.com for a long time. When I checked it recently, I found it has shut down. Now that domain is on sale. Could anyone tell where the owner has moved the site? I really appreciate. I used to teach my son a lot of techniques from that site. I feel sad why it was taken down. Thanks...

kevsup · Anonymous

The website isn't working anymore, so I was wondering if anybody could help me with base manipulation. Sometimes there are questions that are decimal bases like: .44 base 8 * .17 base 7. How would I do that type of problem. I remeber it was on the webpage but I forgot about it and now its not working. I have...

Anonymous

I want to find the next number of the sequence.. 4,7,9,40,41...?

kevsup · kevsup

I competed in number sense in high school and really enjoyed it! Math-magic was very helpful for many types of problems, and for that I thank whoever created the website. However somehow I never came across this specific forum until now, so hello all! Several weeks after the 2014 UIL academics seas...

MKHN15 · MKHN15

Can anyone tell me how to prepare for the number sense test? It's my first year doing this and I don't have a clue of how to study.

mrs05 · mrs05

Hi, Does anyone know when and where is the TMSCA elementary contests around Houston for the academic year 2015-2016? I found that there is a Middle School contest on Oct 24 at one of Fort Bend ISD middle schools. Thank You

texasnumbersense · texasnumbersense

How can I do this problem quickly? Find the remainder:(2^6 x 3^5 - 5^4) / 7The answer is 3

ashsang123 · ashsang123

step 1: write square of last digit. step 2: square of first two digit+(2 x first digit x last digit) + last digit. example : 256 x 256 1. write 6 x 6 = 36 2. 25 square is 625 so 625+(2x2x6)+6=655 so answer is 65536

Anonymous

The website says it has an internal error. Could anyone elaborate? Thanks!

Anonymous

http://www.math-magic.com/probability/prob_to_odds.htm

Anonymous

I'm not sure how to do this, and I ran into it on an UIL 2010 NS test... 213*411=___________ I was thinking that 3 digit multiplication would be a bit tedious, and was hoping that maybe there was some specific trick to multiplying by 411 or by 213...please help!

webmaster · webmaster

Okay, Here is a new problem that needs worked on. Let's see what everyone comes up with. This is a discussion that has branched off of an earlier thread. If you want to read up on it, go here. Here is a copy of my last post. Let's see what transpires! -------------------...

MKHN15 · MKHN15

Where can I find Elementary Number Sense Tests!!!

MKHN15 · MKHN15

What happened to the TCM Math website?

MKHN15 · MKHN15

Can someone help me with ratios? I'm having a hard time understanding it.

MKHN15 · XXX

PLEASE SOMEBODY SEND ME SOME NUMBER SENSE TESTS TO PRACTICE ON. MY EMAIL IS sonicxan@gmail.com

shannoel · shannoel

I need to know the next number in this sequence. Please help me. 38978567796588

lejereanu · lejereanu

Say we have an urn containing 1000 tickets. 50 of them are winning tickets. The chance any one person will draw a winning ticket is 5%. But what is the chance of a winning ticket beeing drawn if 2 people draw? What about if 3, or 4, or 5 or so on? Is there a formula that can be used? I assume it is a little more com...

umar · David Stevenson

Hey, sorry this is a noob question, but can anyone refresh me about the divide-by-9 trick? I'm having trouble breaking 110 without this.

fht · fht

NS: 77/7 MA: 58/3 CA: 49/14 CS: 38/9 SC: Conflict with CS. How did it go, people? Best Wishes -- Edited by fht at 22:33, 2007-01-13

JLMHS · JLMHS

I am new to UIL Number Sense. I need some games to teach this information, or I will surely lose some students. It is an afterschool program.

Anonymous

Ben has 6 base ten blocks. The value of her blocks is more than 200 and less than 220. What blocks might she have? Find all possible answers using an organized list. Thank you so much!!

dx4909

How do you determine if a number is evil?

johnsbravo · johnsbravo

Hello All, I'm promoting a website that provide corporate Logo Design services at cheaper prices. I need your feedback so that I can forward them to concern department to provide better services and improve its overall appearance. Thanks

Anonymous

If f(x) = (2x-5)/(3x+4), then f'(2) =_________________ I don't know how to do this problem because of the apostrephe on the f'2

Topic		Started By	Replies	Views	Last Post
	STICKY: Two Requests (Preview) To all: I only have 2 requests: #1 -> Make a new thread for every different set of problems you have. If you have 5 questions you can put them in one thread, but after they are answered and you have additional questions (not pertaining to what was just answered), please make a new thread. ...	webmaster	6	6306	Sep 20, 2011 by repsky912
	STICKY: A quick note.... (Preview) To all: Please note that you can find out a lot of information just by visiting: www.math-magic.com. If there is something you can't find on there, you can either email me (webmaster@math-magic.com) or post a thread in this forum. Webmaster	webmaster	0	3412	Feb 20, 2004 by webmaster
	How to find the determinant in number sense ? (Preview) The determinant of [ 1 3k ] =6. K= ??? [4 12 ]	Anonymous	0	57	May 2, 2024 by Anonymous
	3 Practice Tests (Preview) Here are 3 practice tests! For ease of downloading, I made them all into .zip files although every one of the three are different file formats. By the way guys, thanks for the ANSWER KEYS!!!!!!!!!!!! At least Sam gave one. Anyway...enjoy! Sam's Test (The #1 scorer in the state on t...	webmaster	6	1545	Apr 25, 2018 by Hagget85
	How to improve number sense... (Preview) Hi, I'm a 6th grader in Dallas, Texas, and I was wondering how to get better scores in number sense. Currently, I'm not getting very good scores on my practice tests (70 - 90), while other people are getting scores over 130. I've looked at a lot of different websites like mathninja.org, and I've found pa...	Anonymous	0	861	Apr 8, 2018 by Anonymous
	math-magic.com (Preview) Hi, I haven't checked math-magic.com for a long time. When I checked it recently, I found it has shut down. Now that domain is on sale. Could anyone tell where the owner has moved the site? I really appreciate. I used to teach my son a lot of techniques from that site. I feel sad why it was taken down. Thanks...	mrs05	0	1287	Aug 3, 2016 by mrs05
	Base manipulation (Preview) The website isn't working anymore, so I was wondering if anybody could help me with base manipulation. Sometimes there are questions that are decimal bases like: .44 base 8 * .17 base 7. How would I do that type of problem. I remeber it was on the webpage but I forgot about it and now its not working. I have...	Anonymous	1	1404	Feb 13, 2016 by kevsup
	Finding the next number of the sequence (Preview) I want to find the next number of the sequence.. 4,7,9,40,41...?	Anonymous	0	1394	Feb 5, 2016 by Anonymous
	Slideshow compilation of number sense tricks (Preview) I competed in number sense in high school and really enjoyed it! Math-magic was very helpful for many types of problems, and for that I thank whoever created the website. However somehow I never came across this specific forum until now, so hello all! Several weeks after the 2014 UIL academics seas...	kevsup	0	1346	Feb 2, 2016 by kevsup
	Prepare for the Number Sense Test (Preview) Can anyone tell me how to prepare for the number sense test? It's my first year doing this and I don't have a clue of how to study.	MKHN15	1	1513	Feb 2, 2016 by kevsup
	TMSCA Elementary (Preview) Hi, Does anyone know when and where is the TMSCA elementary contests around Houston for the academic year 2015-2016? I found that there is a Middle School contest on Oct 24 at one of Fort Bend ISD middle schools. Thank You	mrs05	0	1268	Oct 4, 2015 by mrs05
	Finding the remainder of an expression (Preview) How can I do this problem quickly? Find the remainder:(2^6 x 3^5 - 5^4) / 7The answer is 3	texasnumbersense	1	1314	Apr 22, 2015 by Anonymous
	square of a three digit number with middle digit 5 (Preview) step 1: write square of last digit. step 2: square of first two digit+(2 x first digit x last digit) + last digit. example : 256 x 256 1. write 6 x 6 = 36 2. 25 square is 625 so 625+(2x2x6)+6=655 so answer is 65536	ashsang123	0	1482	Mar 27, 2015 by ashsang123
	Texasmath.org: Has it shut down? (Preview) The website says it has an internal error. Could anyone elaborate? Thanks!	Anonymous	0	1402	Feb 25, 2015 by Anonymous
	mistake in probability to odds page (Preview) http://www.math-magic.com/probability/prob_to_odds.htm	Anonymous	0	1555	Jul 18, 2014 by Anonymous
	Multiplying two 3-digit numbers (Preview) I'm not sure how to do this, and I ran into it on an UIL 2010 NS test... 213*411=___________ I was thinking that 3 digit multiplication would be a bit tedious, and was hoping that maybe there was some specific trick to multiplying by 411 or by 213...please help!	Anonymous	7	9267	Jul 16, 2014 by Anonymous
	New Problem: Sum of Triangular Number (Preview) Okay, Here is a new problem that needs worked on. Let's see what everyone comes up with. This is a discussion that has branched off of an earlier thread. If you want to read up on it, go here. Here is a copy of my last post. Let's see what transpires! -------------------...	webmaster	8	8849	Apr 8, 2014 by Anonymous
	Number Sense Tests (Preview) Where can I find Elementary Number Sense Tests!!!	MKHN15	0	1662	Jan 21, 2014 by MKHN15
	TCM Math (Preview) What happened to the TCM Math website?	MKHN15	0	1590	Jan 21, 2014 by MKHN15
	Ratios (Preview) Can someone help me with ratios? I'm having a hard time understanding it.	MKHN15	0	1526	Jan 21, 2014 by MKHN15
	NEED NUMBER SENSE TESTS FOR HIGH SCHOOL (Preview) PLEASE SOMEBODY SEND ME SOME NUMBER SENSE TESTS TO PRACTICE ON. MY EMAIL IS sonicxan@gmail.com	XXX	2	2296	Jan 21, 2014 by MKHN15
	HELP!! (Preview) I need to know the next number in this sequence. Please help me. 38978567796588	shannoel	0	1455	Dec 24, 2013 by shannoel
	a question about probabilities (Preview) Say we have an urn containing 1000 tickets. 50 of them are winning tickets. The chance any one person will draw a winning ticket is 5%. But what is the chance of a winning ticket beeing drawn if 2 people draw? What about if 3, or 4, or 5 or so on? Is there a formula that can be used? I assume it is a little more com...	lejereanu	0	1607	Nov 22, 2013 by lejereanu
	Hey, what's the divide-by-9 trick? (Preview) Hey, sorry this is a noob question, but can anyone refresh me about the divide-by-9 trick? I'm having trouble breaking 110 without this.	David Stevenson	10	9135	Oct 7, 2013 by umar
	UIL A (Preview) NS: 77/7 MA: 58/3 CA: 49/14 CS: 38/9 SC: Conflict with CS. How did it go, people? Best Wishes -- Edited by fht at 22:33, 2007-01-13	fht	15	5759	Feb 16, 2013 by Anonymous
	4th grade number sense games (Preview) I am new to UIL Number Sense. I need some games to teach this information, or I will surely lose some students. It is an afterschool program.	JLMHS	0	1849	Oct 30, 2012 by JLMHS
	Can you help me answer this question? (Preview) Ben has 6 base ten blocks. The value of her blocks is more than 200 and less than 220. What blocks might she have? Find all possible answers using an organized list. Thank you so much!!	Anonymous	0	1701	Oct 27, 2012 by Anonymous
	Evil numbers (Preview) How do you determine if a number is evil?	dx4909	1	2563	Mar 12, 2012 by Anonymous
	REVIEW MY WEBSITE (Preview) Hello All, I'm promoting a website that provide corporate Logo Design services at cheaper prices. I need your feedback so that I can forward them to concern department to provide better services and improve its overall appearance. Thanks	johnsbravo	0	1787	Mar 2, 2012 by johnsbravo
	can someone tell me how to do this problem? (Preview) If f(x) = (2x-5)/(3x+4), then f'(2) =_________________ I don't know how to do this problem because of the apostrephe on the f'2	Anonymous	1	2426	Jan 16, 2012 by Anonymous
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