Simply - calculation
The most important math concept is the idea of zero.
A math CONCEPT is a fancy way of describing the different ways and things you can and can't do in math. A math Concept can be 5!. That in term equals 5*4*3*2*1, which then = 120.
nope math is real, but is an abstract concept
A math concept is how you solve a math problem or the ideas. You usually have to memorize math concepts.
"key concept" is not a mathematical term . A key concept is an important idea. Two key concepts in math are derivatives and integrals of functions. ( "function" is also a key concept.)
There is no such concept in maths. A plane figure is a mathematical concept but that is not what the question is about.
zero
All the time.
Number!
No. Math cannot stink, it is an abstract concept and has no odor. Also, it is a matter of opinion.
fibinochi sequences
Not aware that "intimidating" is a mathematical term or concept.