Content about “
arithmetic

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Triangular number patterns

There are triangular numbers hiding all over the standard multiplication table! Find out how to discover them in this article!
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The PEMDAS Paradox

It looks trivial but it keeps going viral. What answer do you get when you calculate 6÷ 2(1+2)? David Linkletter explains the source of the confusion.

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Arithmetic billiards

Need to find the least common multiple or greatest common divisor of two numbers? A billiard table of the right proportions holds the answers!
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So you think you can add up?

Why do we add fractions the way we do? A very close look at addition reveals the answer — and it also works for negative numbers.