New posts in arithmetic

Why is 0.3 to power of 2 0.09 and not 0.9? [closed]

arithmetic exponentiation decimal-expansion

How to calculate the number of decimal digits for a binary number?

algorithms arithmetic

Distances and speeds

When is $\sqrt{a^2}=\pm a$ and when is $\sqrt{a^2}=a$?

Simplifying nested square roots ($\sqrt{6-4\sqrt{2}} + \sqrt{2}$)

arithmetic radicals

Parametrizing the square spiral

geometry arithmetic parametrization visualization

Dividing Rs.69 among 115 students, each girl gets 50 paise less than a boy; each boy gets twice the paise as each girl. How many girls in the class?

arithmetic ratio

How to get count of digits of a number

Why is the $0$th power mean defined to be the geometric mean?

calculus limits arithmetic average means

Daily exercises to speed up my mental calculations?

arithmetic big-list mental-arithmetic

Divisibility question from a very old textbook.

elementary-number-theory arithmetic

Multiplying two complex numbers using only three multiplications of real numbers

complex-numbers arithmetic

Predict Tens Digit in Multiplication Table. 7*8 = predict 5 for tens. Rule for finding the pattern + Easy-Guess Trick for kindergarten kids.

number-theory elementary-number-theory modular-arithmetic arithmetic

How many times can you halve a number?

Why is the square root of a negative number impossible?

Books, sites, guides about mental arithmetic by hand and tricks?

reference-request arithmetic book-recommendation online-resources mental-arithmetic

What calculation shortcuts exist to help or speed-up mental (or paper) calculations?

big-list arithmetic

Why can't $|x-2|$ be less than zero?

algebra-precalculus definition arithmetic absolute-value

If "multiples" is to "product", "_____" is to "sum"

terminology arithmetic

Prove that $4$ is the only solution to $2+2$. [duplicate]

arithmetic proof-verification natural-numbers