New posts in arithmetic

Why are tetrations not useful?

arithmetic tetration hyperoperation

MENSA IQ Test and rules of maths

arithmetic calculator

Is there a way to prove that $2+2$ really equals $4$?

Can every integer greater than 5 be written as the sum of exactly one prime and one composite?

prime-numbers arithmetic

Definition of a congruence in Chinese Remainder Theorem

elementary-number-theory modular-arithmetic arithmetic

How to find out which number is larger without a calculator?

algebra-precalculus inequality arithmetic exponentiation

Arithmetic mean. Why does it work?

statistics arithmetic means

How to solve this problem on alligations with a precision?

Elliptic curve addition: why does it work in any field?

group-theory arithmetic finite-fields elliptic-curves cryptography

Base system and divisibility

elementary-number-theory arithmetic

What is the fastest way to multiply two digit numbers?

arithmetic mental-arithmetic

can one derive the $n^{th}$ term for the series, $u_{n+1}=2u_{n}+1$,$u_{0}=0$, $n$ is a non-negative integer

sequences-and-series arithmetic recurrence-relations

Subtracting Quarters of Squares Equals Multiply?!

arithmetic square-numbers

Time and work. How many questions does Mini make in x minutes?

algebra-precalculus arithmetic

How can $\sqrt{x^2}=|x|$ [duplicate]

algebra-precalculus arithmetic absolute-value radicals

Why is $\sqrt{8}/2$ equal to $\sqrt{2}$?

algebra-precalculus arithmetic radicals

How to arrange these 10 digits to make a correct equation?

arithmetic puzzle

Given a set of digits, what is the biggest number we can make using exponentiation - numberphile noodle quiz

combinatorics elementary-number-theory arithmetic puzzle big-numbers

Doing take aways

Why left side is negative on Number line?

arithmetic number-line