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Sophie Alpert

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elementary-number-theory

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11 posts edited

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161 votes cast

Answers (13)

Votes Activity Newest

88	How can you prove that the square root of two is irrational?
30	Probability that a stick randomly broken in two places can form a triangle
27	Combinations of selecting $n$ objects with $k$ different types
26	Why is the 2nd derivative written as $\frac{\mathrm d^2y}{\mathrm dx^2}$?
22	Balance chemical equations without trial and error?

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Reputation (3,622)

+20	Probability that a stick randomly broken in two places can form a triangle
+20	How can you prove that the square root of two is irrational?
+10	Tiling a $3 \times 2n$ rectangle with dominoes
+10	Why is the 2nd derivative written as $\frac{\mathrm d^2y}{\mathrm dx^2}$?

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Questions (9)

Votes Activity Newest

21	Proving Stewart's theorem without trig
19	Tiling a $3 \times 2n$ rectangle with dominoes
17	Finding $\int_0^{\pi/2} \sin x\,dx$
10	Counting how many hands of cards use all four suits
10	Probability that two people see each other at the coffee shop

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Tags (32)

113 elementary-number-theory × 3	30 monte-carlo
88 radicals	27 combinatorics × 5
88 rationality-testing	26 derivatives
38 calculus × 3	26 notation
35 probability × 3	25 induction × 2

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Votes Activity Newest Views Added

6	a question related to two competing patterns in coin tossing

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Votes cast (161)

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151	up		43	question
10	down		118	answer

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