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Apr
26
revised What's the solution to this puzzle?
Title and tags
Apr
26
suggested approved edit on What's the solution to this puzzle?
Apr
21
comment Concatenating the first n semiprimes (in order) to get a semiprime $469101415$…
The two factors of $46910\dots129$ are $561142648578701032870967$ and $83597533782255928599777933064811804102379251037232937344874950747087$
Apr
10
revised How to determine is a matrix is invertible?
Better title and grammar
Apr
10
suggested approved edit on How to determine is a matrix is invertible?
Apr
7
comment Scientific calculator
@user3699621, There are online calculators that do what you want, for example here.
Apr
4
comment Extensive Logarithm Question
@egreg, $2^{x+1} = 2^{x+1} + 2^{x+1}$. Now subtract $2^{x+1}$ from each side.
Mar
31
revised Log value to absolute
Added image to question and sundry edits.
Mar
31
suggested approved edit on Log value to absolute
Mar
29
revised Verify correctness of this PDA
Added image to the question.
Mar
29
suggested approved edit on Verify correctness of this PDA
Mar
23
reviewed Reviewed Simplifying Integral Expression w/ Antiderivative
Mar
4
reviewed Reviewed If $R=\{(x,y): x\text{ is wife of } y\}$, then is $R$ transitive?
Mar
1
comment Problem of two scales in a corridor
@Hamza, no the height $h$ is not dependent on the length $x$. If you draw the picture several times with the same values of $y$ and $z$ you will see that $h$ is always the same. (Assuming that you mean that $y$ and $z$ are perpendicular to $x$ as drawn in the picture.)
Feb
19
reviewed Reviewed Combinatorics problem - Distribute cakes amongst peers
Feb
19
reviewed Reviewed Clarification about percentage calculus
Feb
12
revised What type of discontinuity is found in this graph?
Added graph in to question, added tags
Feb
12
suggested approved edit on What type of discontinuity is found in this graph?
Feb
11
revised Ratios of the major axes of ellipses inscribed in a triangle
Title, texification, tags
Feb
11
suggested approved edit on Ratios of the major axes of ellipses inscribed in a triangle