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Mathematics
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John Douma

Apparently, this user prefers to keep an air of mystery about them.

254
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  • Member for 5 years, 9 months
  • 1,076 profile views
  • Last seen 5 hours ago

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Score 42
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Score 38
Posts 11
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Top Posts (254) All Questions Answers | Votes Newest

24 Proof: 1007 can not be written as the sum of two primes. Nov 13 '15
15 Counting binary operations on a set with $n$ elements Apr 28 '13
12 What is sum of all positive odd integers less than $1000$? Jun 12 '13
11 How do we know the ratio between circumference and diameter is the same for all circles? May 1 '16
10 How do I find a point a given distance from another point along a line? Jun 2 '13
8 If two sets $A$ and $B$ have equal power sets, can we conclude that $A=B$? Oct 7 '15
8 Example of $a,~b\in G$ such that $ab\in H\leq G$ and $a^2b^2\notin H.$ Jan 9
7 Problem with basic definition of a tangent line. Apr 18 '16
7 When will two cars pass each other May 16 '13
6 Best Maths Books for Non-Mathematicians Mar 28 '13
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