Multiplying a infinite number with a rational number?
286
Is it true that $0.999999999\ldots=1$?
4861
Can 0.99999999999 be rounded to 1.0 when multiplying?
53156
Infinitely many numbers not expressible in the form $a^n+b^n+c^n$
23112
Solving an equation with rational expressions (step by step)
41767
Sequence of rational numbers converging to an arbitrary irrational number $\beta$.
102583
Infinite number of rationals between any two reals.
116822
Finding the next rational number
143054
Can you raise $\pi$ to a real power to make it rational?
55777
A tricky sum to infinity
22408
Jutifying: irrational + rational = irrational
153294
What is the infinite product of (primes^2+1)/(primes^2-1)?
147920
Infinite powering by $i$
30478
How to prove that a number is irrational
34227
Continued fraction of a square root
9969
Is infinity a real number?
62348
One divided by Infinity?
24924
Computing an infinite product