Questions tagged [arithmetic]

Questions on basic arithmetic involving numerical quantities only. Questions involving variable values (other than the result of the operation) should be placed under the (algebra-precalculus) tag. Questions about number theory (sometimes called "arithmetic") should not use this tag and should instead use (number-theory) or (elementary-number-theory).

Arithmetic is defined as operations upon numbers using $4$ main operations along with many others:

addition - the sum of two numbers

subtraction - the difference of two numbers also defined as the addition of negative numbers

multiplication - the area of a rectangle with sides of lengths equal to the two operands

division - the number of times one number can be subtracted from another before equaling zero. Sometimes it will allow decimals and in other cases there will be a remainder left over when a number doesn't go into another evenly

See Arithmetic.

6283 questions

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1 answer

Why is every number which ends in 5 divisible by 5?

Is there more of an answer to this which is more than just 'it does'?

arithmetic

asked Aug 17 '14 at 07:55

BenjaminJB

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1 answer

Simplifying an equation step by step

I am not able to go from the left hand side to the right hand side. Could someone take me through the steps, I tried using common denominator (y^2-x)^2, but was not able to get the result on the right hand side of the…

arithmetic

asked Aug 12 '14 at 21:37

ALEXANDER

2,099

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2 answers

Common divisor of the form d = ax+by

There is a theorem that says that every pair of integers $a$ and $b$ has a common divisor $d$ of the form $d = ax+by$ where $x$ and $y$ are integers. Is it true that $d$ is also definitely the greatest common divisor of $a$ and $b$? Why is that so?

arithmetic

asked Aug 09 '14 at 15:47

darkgbm

1,810

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1 answer

Vector Image Representation on 640X480 Screen

Im trying to learn Computer Graphics. I have the following statement For the representation of vector images, we assume that a typical image consists of 500 lines [BHS91]. Each line is deﬁned by its coordinates in the x direction and the y …

arithmetic

asked Aug 08 '14 at 03:37

techno

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2 answers

What is the name for a number plus itself?

I'm asking out of curiosity more than anything else. A number multiplied by itself is squared, is there a specific mathematical term for a number plus itself? $(n*n = n^2, n+n=?)$

arithmetic

asked Aug 05 '14 at 08:24

BenjaminJB

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2 answers

Greatest possible length to measure given lengths

I was given a question to find a greatest possible length to measure $495$, $900$,$1665$ (in centimetres). The solution is finding GCF or GCD or HCF (highest common factor) of these numbers which is $45$. How does this works in real time, please…

arithmetic

asked Aug 04 '14 at 16:40

Ganesh Vellanki

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3 answers

I think I can prove this property only when exponents are integers. But here is my example: $a(x-b)^{1/2} = (a^2x-a^2b)^{1/2}$ This type of foiling is weird and I wish to see a proof of this. Namely, for integer exponents I thought I could do…

arithmetic

asked Jul 14 '14 at 16:58

DLV

1,740
4
17
28

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2 answers

Profit, Loss and percentage problem.

A dishonest businessman professes to sell his articles at cost price but he uses false weight by which he cheats by 10% while buying and 10% while selling. find his profit percentage?

arithmetic

asked Jul 09 '14 at 15:09

R.Chakraborty

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