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David K

Massachusetts

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Top Questions
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Top Answers
254
Calculating the length of the paper on a toilet paper roll
math.stackexchange.com

94
Why is a geometric progression called so?
math.stackexchange.com

65
Exam with $12$ yes/no questions (half yes, half no) and $8$ correct needed to pass, is it better to answer randomly or answer exactly 6 times yes?
math.stackexchange.com

62
Why are proofs not written as collections of logic symbols but are instead written in sentences?
math.stackexchange.com

62
Why is right to spell "eating" not "eatting"?
ell.stackexchange.com

61
Is there a common saying in English that means "It's just business, I don't feel any shame"
english.stackexchange.com

56
What would you call someone who sneaks into and stays in places where they have to be signed up, e.g. classes/country clubs
ell.stackexchange.com

49
What is the exact difficulty in defining a point in Euclidean geometry?
math.stackexchange.com

47
Identification of a quadrilateral as a trapezoid, rectangle, or square
math.stackexchange.com

44
If squaring a number means multiplying that number with itself then shouldn't taking square root of a number mean to divide a number by itself?
math.stackexchange.com

43
In how many different ways can a 9-panel comic grid be used?
math.stackexchange.com

43
Why is an ellipse, hyperbola, and circle not a function?
math.stackexchange.com

41
Is the proof of Pythagorean theorem using dot (inner) product circular?
math.stackexchange.com

39
A goat is tied to the corner of a shed
math.stackexchange.com

33
What's wrong with solving absolute value equations in this way?
math.stackexchange.com

33
What is the difference between partial and normal derivatives?
math.stackexchange.com

33
An adjective for a woman showing lots of skin?
ell.stackexchange.com

32
Is $∅ ∈ \{ \{∅\} \}$ true?
math.stackexchange.com

30
What is $0\div0\cdot0$?
math.stackexchange.com

30
What is the difference between feet and very feet?
ell.stackexchange.com

29
Are wings any more efficient at creating lift, versus orienting the engine's thrust downwards?
aviation.stackexchange.com

28
Solution for kth row of Pascal's triangle for a job interview
codereview.stackexchange.com

28
What is the mistake with this proof that commutativity implies associativity?
math.stackexchange.com

28
Row vector vs. Column vector
math.stackexchange.com

28
Is $\pi$ equal to $180^\circ$?
math.stackexchange.com

24
How to find length of a part of a curve?
math.stackexchange.com

24
Why does an integral change signs when flipping the boundaries?
math.stackexchange.com

23
Confusion about the null (empty) set being contained in other sets
math.stackexchange.com

23
Why do differentiation rules work? What's the intuition behind them? (Not asking for proofs)
math.stackexchange.com

23
How would you count a base $> 36$ system?
math.stackexchange.com

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