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46
The largest Monday number
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46
$55$ gangsters shoot the nearest gangster to them, where all the distances between them are different. Prove that at least one gangster will survive.
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37
Using the Left-Inverse to "Solve" an Impossible System of Equations
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34
Integral of a function's derivative does not equal the original function?
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23
Total distance traveled when visiting all rational numbers
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18
Number of total possibilities for an equation
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16
Intuitive geometric explanation: existence of eigenvalue in odd dimension real vector space.
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15
Professor Halfbrain and the 9x9 chessboard (Part 1)
puzzling.stackexchange.com

15
Likeable Alb's Chip Restaurant
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14
Proof that rational functions are an ordered field, but non-archimedean - Bartle's elements of real analysis
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14
A knockout tournament
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13
Why is this obviously not a Fermat triple?
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12
Professor Halfbrain's chessboard theorems
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11
4channer "disproves" cantor
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11
Monotonic function in closed interval
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10
Professor Halfbrain and the 9x9 chessboard (Part 2)
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10
Problem in solving a question concerning real analysis.
math.stackexchange.com

10
How old are the kids?
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10
10 zeroes, 9 ones, and 8 twos are written on the board. Given the operations, can you set all numbers to become zero?
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9
Explicit form for a difficult sequence
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9
If $g$ is Riemann-integrable in a closed interval and $f$ is a increasing function in a closed interval, is $g\circ f$ Riemann-integrable?
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9
Given that $f(x) = \frac{x^2}{x-2}$ show that $8 \le \int_3^4 f(x)\,dx \le 9$.
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9
pigeonhole principle clarification
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9
Using a balance to determine any weight with a set of weights weighing powers of 3
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9
Sum six unique digits to make 20
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8
If$ A^4 = 0$ matrix, and $A$ is not the $0$ matrix, what does that say about $A$'s eigenvalues?
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8
Prove or disprove: For every number $s \in \mathbb{R} \setminus \mathbb{Q}$ there is a $t \in \mathbb{R}$ with $s+t \in \mathbb{Q}$
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8
Property of set exclusion set.
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8
Prove that there is no polynomial $P(x) = a_n x^n + a_{n-1} x^{n-1} + \ldots + a_0 $
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8
Professor Halfbrain and the powers of 2016
puzzling.stackexchange.com

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