Patrick

 10 The interest rate last year was 2%, this year it is 3% - did interest rates go up 1% or 50% 9 How can I prove that one of $n$, $n+2$, and $n+4$ must be divisible by three, for any $n\in\mathbb{N}$ 5 Best way to express 2014 4 Induction: $n + 3 < n!$ for all $n>3$ 4 Example of set which contains itself

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### Questions (13)

 122 What are some examples of notation that really improved mathematics? [closed] 30 When is $\binom{n}{k}$ divisible by $n$? 12 Formula for reversing digits of positive integer $n$ 6 Convergence/Divergence of a particular infinite nested radical 4 Proof for number of weak compositions

### Tags (66)

 15 probability × 36 5 combinatorics × 9 12 elementary-number-theory × 11 5 calculus × 6 10 definition 5 sequences-and-series × 5 9 divisibility × 3 5 probability-distributions × 5 6 induction × 5 5 summation × 4

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 Mathematics 1,563 rep 22 gold badges1313 silver badges1919 bronze badges Stack Overflow 101 rep