







des conversions de bases différentes 
20030104 

Christian pose la question : Je cherche désespérément la (les) règle(s) pour réussir des conversions de bases différentes : de base x vers base y. Claude Tardif lui répond. 





Addition and subtraction base 5 
20170129 

BABAWALE pose la question : Simplify 342five +132five223five Penny Nom lui répond. 





4444 base five 
20161111 

John pose la question : If 4444 is a number in Base5, is 624 its value? Penny Nom lui répond. 





Subtraction of two numbers in different bases 
20161007 

Wica pose la question : Hello,
So happy I found this site. I am having problems with bases. My question is :
Please perform the subtraction between two number over different bases :
A. (5874)base 12  (216)base 9
B. (216)base 9  (5874)base 12 Penny Nom lui répond. 





A problem in base x 
20160325 

Malith pose la question : determine the value of base x of (211)x = (152)8
please mentioned the steps
Thank you Penny Nom lui répond. 





Division base 5 
20160201 

Jenalee pose la question : I am having problems with a dividing bases question. I reviewed two that I could find in the database and tried the question as shown but I am still getting the wrong answer.
My question is 32\24043 to the base of 5 for both. Penny Nom lui répond. 





Subtraction in a base larger than ten 
20160131 

Jenalee pose la question : Hello,
So happy I found this site. I am having problems with bases. My question is 97B9  6A3A base 16 for both.
Please help. Penny Nom lui répond. 





Subtraction in base 8 
20151021 

Adi pose la question : Hi!
Can you help me with a nagging problem, I searched a lot over the web and couldn't find it.
I saw this site I gave it a try and I found it to my liking.
I am confused how to subtract bases from other bases:
567 (in base 8)
 456 (in base 8)
______________
?????????
How do you do this? I do know how to carry and subtract with different bases. Can
you please help me?
Thanks,
Adi Penny Nom lui répond. 





Integers in different bases 
20150305 

Michael pose la question : Let k be a positive integer so that 28 (subscript)k = 132 (subscript)5 Penny Nom lui répond. 





211basex=152base8 
20141215 

Humaira pose la question : 211basex=152base8 Penny Nom lui répond. 





Division in base 3 
20140930 

Nnubia pose la question : 1021 in base 3 divided by 2 in base 3 Penny Nom lui répond. 





Base 6 
20140910 

Amanda pose la question : using base 6, what is the next number after 25? 35? 55? and 455?
I need to be able to show the base 6 material. Penny Nom lui répond. 





35 base 6 
20140910 

Amanda pose la question : Sorry I am having trouble understanding base,
35 in base 6 means 3 10's and 5 ones, which is the same ____ in base 10? Penny Nom lui répond. 





211(base x)=152(base 8) 
20140909 

Vaidehi pose la question : Find the base value (i.e. x):
211(base x)=152(base 8) Penny Nom lui répond. 





How can eight eights be 1000? 
20140620 

Aamir pose la question : The digit 8 if we add it 8 time in it the answer should be equal to 1000.it may possible.i.e.,
8+8+8+8+8+8+8+8=1000 Penny Nom lui répond. 





Base 5 
20130930 

Zakir pose la question : Sir I wanna know something about base 5 number system
Why we use it and who use this ? and what is the purpose of it Robert Dawson lui répond. 





How can I teach how to change bases? 
20130220 

Tammy pose la question : How can I teach how to change bases? For example 80 base 10 changed to base 3.
Thank you! Harley Weston lui répond. 





The multiplication table for the different bases 
20130201 

sylvia pose la question : I am having a difficult time trying to figure out how to fill in the multiplication table for the different bases. i don't know how to get the numbers. Penny Nom lui répond. 





Division in base eleven 
20120527 

Zoe pose la question : How do you divide numbers that are in base 11?
For example;
9A7A6A divided by A Penny Nom lui répond. 





Bases larger than ten 
20091214 

Nick pose la question : For numbers in bases larger than ten, what are the digits by mathematicians' conventions?
I assume the first 10 are always 09. I know two computer science conventions (for hexadecimal (AF caseinsensitively) and for base 85 (casesensitivity plus 23 other characters)) and as a school student I learned that base 12 uses either T and E (which confused me when I thought they stood for Eleven and Twelve) or A and B, the latter as capitals only. Clearly, these conventions are in conflict.
I saw your reply in http://mathcentral.uregina.ca/QQ/database/QQ.09.99/magin1.html as accessed a few minutes ago but hope that in the 10 years since then mathematicians have arrived at a convention. Have they?
Thank you.

Nick Claude Tardif lui répond. 





A base 7 number and a base 9 number 
20090709 

koteawarao pose la question : Find a base 7 threedigit number which has its digits reversed when expressed in
base 9.
ans: (281) base 7 and (182) base 9 Harley Weston lui répond. 





Multiplying in different bases 
20090225 

Susan pose la question : 11 base 2 X 22 base 3 + 33 base 4 = _________ base 5 Robert Dawson lui répond. 





In what base is 3x3= 10? 
20090214 

David pose la question : In what base is 3x3= 10, 3x3=11, 3x3 = 12? is there a fast way to see this or do I have to create multiplication tables until I find the right one? Penny Nom lui répond. 





Division in different bases 
20081202 

MICHELLE pose la question : DIVIDE 538 BY 14 IN BASE 2, 3, 4 & 5 Penny lui répond. 





How do you change bases? 
20080617 

Peter pose la question : How do you change bases eg. 121 from base 3 to base 5? Penny Nom lui répond. 





Convert from base 6 to base 12 
20080302 

Jade pose la question : I am trying to convert 13405 base 6 to a base 12 number. I am not allowed to go into a base 10 number. How will can I base 12 without doing anything with base 10? Thank you kindly. Stephen La Rocque and Penny Nom lui répond. 





Multiplying numbers in bases other than 10 
20080108 

Imaiya pose la question : In class we've been learning about numbers with a base other than ten. For example, base 7, base 5,
and base 6. What's really stumping me is how to multiply these numbers, when they aren't a base of 10.
I've had it explained to me once, but don't seem to understand it. Here are the equations, and I've listed the first few numbers for that particular base.
Base 5: 0,1,2,3,4,10,11,12,13,14,20 etc... The Equation: 34 x 42
Base 9: 1,2,3,4,5,6,7,8,10,11,12,13,14, etc... The Equation: 56 x 78
If you could explain to me how to multiply numbers with any type of base, I'd really appreaciate it. Also
if you could show me how to do one of the questions that I listed, that would really help me =) Thanks so much,
and once again, thank you for your great site! Stephen La Rocque lui répond. 





Representing different bases 
20071205 

Sudhir pose la question : What does a number subscripted to another one denote? (I know that a number superscripted to another denotes the power, but the subscript number is something I have never seen before.) Stephen La Rocque lui répond. 





Converting bases 
20071024 

Johanna pose la question : Is there an easy way to convert from base to base. For example, base 5 to base 9 or base 2 to base 4 etc Stephen La Rocque and Penny Nom lui répond. 





In what base does 25+25=51? 
20070403 

Jenna pose la question : In what base does 25+25=51? Stephen La Rocque and Penny Nom lui répond. 





A 3digit number in base 7 has its digits reversed when expressed in base 9. 
20070128 

Ashley pose la question : A 3digit number in base 7 has its digits reversed when expressed in base 9. Find this number. Penny Nom lui répond. 





Arithmetic in bases other than 10 
20031022 

Kim pose la question : how do you add, subtract, multiply and devide in base 3, base 5, etc? Penny Nom lui répond. 





Numbers in base 5 
20030216 

Lori pose la question : I'm trying to help my 6th grader with converting numbers like 82 to base 5 and 182 to base 12. We saw your examples on 613, but still are confused. Penny Nom lui répond. 





A rectangular prism 
20030109 

Julie pose la question : How many faces on a rectangular prism and how many bases? Can the base also be a face and can a face also be a base? Diane Hanson lui répond. 





Base 5 numbers 
20020913 

Vera pose la question : ? how do you change a base 10 number to base 5 Penny Nom lui répond. 





Arithmetic in base 5 
20000920 

Lesley Emerson pose la question : my daughter is 9 and has been aske to solve the following in base 5 3+2 4+10 . . . Penny Nom lui répond. 





Bases other than 10 
19991206 

Garret Magin pose la question : We are doing a lesson on numbers of other bases than 10. We are working with binary, octal, and Hexadecimal. I was wondering what is used to represent number of different bases other then 16? Does it just continue on with the alphabet and if so what happens when you get to Z. It would be a help if you could answer this because it is really bugging me. And none of the math teachers at my school could let me know. Claude Tardif and Patrick Maidorn lui répond. 

