Mathematics Stack Exchange
Mathematics Stack Exchange

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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Operators Game that really confusing

I saw this question on the newspaper and can't solve it, help. Use the four operation sign, substitute them into the question marks between the digits such that the outcome is two(the order of operation doesn't applied, each operation is done one at…
Nerdsome
  • 21
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Cube and Numbers

my question is the following. On an cube are numbers. The numbers are v, l, r, o, u and h. The twelve absolute amounts of the differences of these numbers are the numbers from 1 to 12. The differences are from the two sides which are next to each…
groh
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Interesting Numerical Reasoning Question

Q: Which period saw the greatest decrease in water prices? How do I calculate the percentage decrease between period $y_0$ and $y_1$ for example? My initial instinct was to simply calculate: $\frac {y_0-y_1}{y_0}\times 100 = \frac{100-95}{100}…
Catherine
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Divisibility rule of 11

Let $M$ be a natural number with $n+1$ digits; represented by $M=a_{n}a_{n-1}\cdots a_{2}a_{1}a_{0}$ Show $M$ is divisible by $11$ if and only if $$(a_{0}+a_{2}+a_{4}+\ldots)-(a_{1}+a_{3}+a_{5}+\ldots)$$ is also a divisible by 11 here is…
Educ
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Represented in basis X

Let ABCD represent the digits of the starting number. The four digit number would be represented in basis $X\in \mathbb{N}$ by : $$\textrm{ABCD}=X^{3}.A+ X^{2}.B+ X^{1}.C+ X^{0}.D$$ Am I right ? Thanks a lot.
Educ
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A hard square root question

This is my first question on StackExchange. So my question is: If $$x = \frac{\sqrt{\sqrt5 +2}+\sqrt{\sqrt5-2}}{\sqrt{\sqrt5 + 1}} + \frac{\sqrt{\sqrt5 +2}+\sqrt{\sqrt5-2}}{2\sqrt{\sqrt5 + 1}} - \sqrt{3-2\sqrt2}$$ What is the value of $x^2$? If…
arunkhanna00
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Should BODMAS not be BODMSA?

Let me blindly follow for a second BODMAS. $$ \begin{align*} 1-3+2 &=1-(3+2)\\ &=1-5\\ &=-4 \end{align*} $$ (The brackets are just to make the error clear - I wouldn't write them in "real life".) This is correct according to BODMAS, because BODMAS…
user1729
  • 31,015
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Is it possible to have a mixed parentage of 10% 90%

Is it possible to have a mixed parentage such that you are, for example, 10% Dutch and 90% English? One generation up your mother would be 100% English and your father 20% Dutch and 80% English etc etc. How do you figure this out back up to the…
c4urself
  • 123
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How to calculate price for stamps?

I'm trying to create a programm that has the ability to calculate the most effective way of breaking down the number of stamps (3 and 5 cent) necessary for a consignment. That is - if a transmission costs, for example, 11 cents, it would take one 5…
Xeen
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Dumb question about the division algorithm.

The theorem about the division algorithm says: Given a, b $ \in \mathbb{Z}, b \neq{0}, $ there exist unique numbers q and r , $q,r \in \mathbb Z $such that $ a = bq + r , 0 \lt r \lt |b| $. Can q be zero?
Trux
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Doubt about the domain of functions with odd roots.

Given the function: $f(x) = \sqrt[3]{x} \cdot \sqrt[5]{x-1}$, Wolfram claims the domain is $x\ge1$, the same of the $\sqrt[5]{x-1}$ part. My question is: why isn't the domain $\mathbb{R}$? I've always considered the domain of odd roots to be…
Ferduun
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How to solve $\left(\dfrac{5}{3}\right)^3\left(-\dfrac{3}{5}\right)^2$

I need help in solving this problem (sorry I didn't know how to write it on here).
LuisDavis
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Simple Mathematics equation

My friend shared me an mathematics equation which is following $$3+3\cdot3-3\cdot0=?$$ What is the answer of this equation?
user15973
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Timeline if 0.5 millimetres= 1.5 years how many millimetres would equal 1 year

Hi I am working on a timeline and know that 0.5 millimetres equals 1.5 years how many millimetres would equal a year thanks.
SG292H
  • 29
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How do you work out $\sqrt[4]{16^3}$ without a calculator.

$$\sqrt[4]{16^3}$$ I just don't know what to do when I get to $4096$. The original equation was $16^{3/4}$.
lotad
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