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TonyK
  • Member for 13 years, 7 months
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  • UK
115 votes

Given a Fibonacci number , find the next Fibonacci number

100 votes
Accepted

Show that a generalized knight can return to its original position only after an even number of moves

82 votes
Accepted

What does the mysterious constant marked by C on a slide rule indicate?

73 votes

An easy example of a non-constructive proof without an obvious "fix"?

70 votes

How does a non-mathematician go about publishing a proof in a way that ensures it to be up to the mathematical community's standards?

66 votes
Accepted

Functions which are Continuous, but not Bicontinuous

55 votes
Accepted

Fewest steps to reach $200$ from $1$ using only $+1$ and $×2$

49 votes

How many non-differentiable functions exist?

49 votes
Accepted

Are we guaranteed that the harmonic series minus infinite random terms always converge?

45 votes

Why is the construction of the real numbers important?

43 votes

How to find irrational numbers between rationals. (And is my method correct?)

41 votes

Most ambiguous and inconsistent phrases and notations in maths

37 votes

Find the value of a+b+c

36 votes
Accepted

Checking a Proof of a Theorem

36 votes

Deciding whether a number is rational (2 examples)

36 votes
Accepted

Is the arc length always irrational between two rational points?

34 votes
Accepted

Given any computable number, is there any algorithm to decide whether it is transcendental?

31 votes

Why is the derivative of a circle's area its perimeter (and similarly for spheres)?

31 votes
Accepted

Getting wrong answer for absolute value inequality and not sure why

29 votes
Accepted

When we say two fields are isomorphic, does that just mean they are isomophic as rings?

28 votes

Pi's Recursiveness

28 votes
Accepted

What does "bounded away from zero" actually mean?

27 votes
Accepted

Formal Proof that area of a rectangle is $ab$

25 votes

prove $f'(x)=f(x)$

25 votes

The Use of the Axiom of Choice in an Elementary Proof

25 votes

Is this a valid attempt at the Riemann Hypothesis?

25 votes

How deep is the liquid in a half-full hemisphere?

24 votes

One question to know if the number is 1, 2 or 3

23 votes

Infinite number of mistakes in a proof

23 votes
Accepted

Can the Surface Area of a Sphere be found without using Integration?

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