If any alternative numbering systems exist that simplify thinking about arbitrary numbers
53824
What could be better than base 10?
66975
Can Mathematica identify formulae or sequences of numbers?
59385
Are there number systems corresponding to higher cardinalities than the real numbers?
90952
Does every number not ending with zero have a multiple without zero digits at all?
15920
Derangements with repetitive numbers
2495
Is there a way to convert number words to Integers?
39737
Given a series of numbers, generate new numbers that are "similar" to the original numbers
118130
Mathematical notation around the world
158091
Is there a system for creating words for ordinal numbers?
70123
How can I form a word like "quadruple" for any number I want?
136885
Series of natural numbers which has all same digits
5375
Is there a bijective function mapping Natural numbers to Natural numbers, other than $f(n) = n$?
108885
Systems of equations with a single number
51191
Does a negative number really exist?
26898
Trouble solving two number theoretical problems
131883
Adding "odd" numbers
153791
Most elegant way to change 0 to 1 and vice versa