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 May 28 reviewed Leave Open What is the probability of covering all $6$ faces of a die after rolling it $14$ times or less? May 25 reviewed Leave Open Why this representation of circle is valid? Feb 26 reviewed Approve Proof of the product rule. Trick. Add and subtract the same term. Feb 8 reviewed Approve Very simple partial differential equation Feb 6 reviewed Approve Generating Alternating Groups Feb 3 reviewed Approve Proof: If $a\mid b$ and $b\mid c$, then $a\mid c$ Feb 3 reviewed Approve Finding $r''(t)=a+tb$ Feb 3 reviewed Approve Using Lagrange multipliers to maximize function Feb 3 reviewed Reject Chinese remainder theorem with squares Feb 3 reviewed Approve why is this the partial solution? Feb 2 reviewed Approve Solving a particular trigonometric equation Feb 2 reviewed Reject Help with Derivative Feb 2 reviewed Approve Finding second derivative for $(a\times tb)\times (a+t^2b)$ Jan 24 reviewed Leave Open Axiom of Completeness for set of integers Jan 24 reviewed Leave Open How often should math students take day breaks and longer breaks or vacations? Any research? Jan 11 reviewed Leave Closed How come mathematics is applicable to the real world? Jan 11 reviewed Close $M$ and $N$ are matrices that satisfy $MNMN=0$,what can we say about $NMNM$. Jan 11 reviewed Looks OK Isolate y in this equation: $y ^ 2 + y = x$ Jan 11 reviewed Leave Open Reference Request, Random Walk Jan 11 reviewed Close Are there more even numbers than odd numbers?