Mathematics
Joe Z.
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66 Answers

Newest Activity Votes
0
Does introducing penalties for getting true/false questions incorrect result in higher skill penetration (less luck/variance)?
Jul 20 '16 at 23:55
2
I can't grasp how these events are independent?
Nov 29 '14 at 5:30
0
Volume of a split log
Nov 18 '14 at 19:13
3
Graph with edge disjoint cycles
Jul 7 '14 at 1:48
9
A year having more than one Friday the 13th?
Jul 6 '14 at 7:26
9
Does 17% have to be equal to 0.17?
Apr 25 '14 at 17:34
2
Is $(-1)^{1/8} + (-1)^{7/8}$ ever a value whose real component is $0$?
Apr 16 '14 at 17:38
1
How can I formulate the two guards puzzle to disallow references to the other guard?
Mar 22 '14 at 2:35
2
Determing the number of possible March Madness brackets
Jan 28 '14 at 8:15
4
$12345679$ and friends
Jan 16 '14 at 0:48
2
Conditions for a decimal to be convertible to binary
Jan 16 '14 at 1:39
3
Calculating the number of possible paths through some squares
Jan 13 '14 at 4:07
3
One question to know if the number is 1, 2 or 3
Oct 4 '13 at 4:57
7
Puzzles or short exercises illustrating mathematical problem solving to freshman students
Sep 23 '13 at 0:11
1
What is the probability that the student knew the answer to at least one of the two questions?
Sep 23 '13 at 0:00
0
Simple geometry question, to be proved without trigonometry
Sep 8 '13 at 4:31
2
Simple geometry question, to be proved without trigonometry
Sep 8 '13 at 4:59
0
Can we give an algorithm to prove a statement?
Aug 15 '13 at 14:23
2
Does introducing penalties for getting true/false questions incorrect result in higher skill penetration (less luck/variance)?
Jun 1 '13 at 2:48
6
Correct $(0.11111111…)_{2}=(10)_{2}$?
Apr 19 '13 at 17:52
4
XOR for 10 and 20
Apr 19 '13 at 17:46
177
Find five positive integers whose reciprocals sum to $1$
Jan 30 '13 at 14:11
0
Proof of “Freshman's dream” in commutative rings
Apr 9 '13 at 12:54
4
Another puzzle with locks
Mar 27 '13 at 14:48
2
Can $\frac{a}{b} + \frac{b}{a}$ ever be bounded from above, if $a, b \in \mathbb{R}$?
Mar 27 '13 at 14:17
2
Prove that line through intersection of line through foots of heights and opposite line and orthocenter is perpendicular to median.
Mar 14 '13 at 20:26
1
Subtract 11011001 from (00100011 + 00001101) using 8-bit signed magnitude arithmetic
Mar 12 '13 at 1:48
5
What was the first bit of mathematics that made you realize that math is beautiful? (For children's book)
Mar 7 '13 at 15:11
4
What was the first bit of mathematics that made you realize that math is beautiful? (For children's book)
Mar 7 '13 at 14:53
1
What is a good measure of “controversy”, given a support score and opposition score?
Mar 2 '13 at 16:01
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