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Jan
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reviewed Approve Spivak Calculus on Manifolds, Theorem 5-2
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reviewed Close Replacing Variables in Integration
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reviewed Approve If a prime number is reversed, and then appended to itself, why is the result always a composite number?
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Jan
6
reviewed No Action Needed Can $n$ vertices be removed so the directed graph contains no cycles?
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awarded  Custodian
Jan
6
reviewed Leave Closed Property of ideal
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6
reviewed Close Fibonacci sequence, strings without 00, and binomial coefficient sums
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reviewed Leave Open Intersection of functions $\ln(x)$ and $\frac{1}{x}$
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reviewed Leave Open connected graph with its vertices
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6
reviewed Leave Open How do I find this limit?
Jan
6
answered If a prime number is reversed, and then appended to itself, why is the result always a composite number?
Dec
19
answered how many ways to choose 3 coins?
Dec
18
answered Four dice, probability that difference of some outcomes is equal to others
Dec
16
answered Expected value of a die when decision to role again depends on previous outcome
Dec
15
comment Taylor approximation for $\ln(1.3)$
Your book probably should say $0.255$.
Dec
15
comment Expected value of this deceptively simple variable
To find $E(Z)$: note that $Z$ is either 1, 0, or -1. With what probability does it take each of those values?
Dec
12
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Dec
11
reviewed Edit Find the last digit of the exponent $x$.
Dec
11
revised Find the last digit of the exponent $x$.
turnt up on the max, fix latex