> For the complete documentation index, see [llms.txt](https://aaronice.gitbook.io/lintcode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://aaronice.gitbook.io/lintcode/mathematics.md).

# Mathematics

- [Ugly Number](https://aaronice.gitbook.io/lintcode/mathematics/ugly_number.md)
- [Ugly Number II](https://aaronice.gitbook.io/lintcode/mathematics/ugly_number_ii.md)
- [Super Ugly Number](https://aaronice.gitbook.io/lintcode/mathematics/super-ugly-number.md)
- [Sqrt(x)](https://aaronice.gitbook.io/lintcode/mathematics/sqrt_x.md)
- [Random Number 1 to 7 With Equal Probability](https://aaronice.gitbook.io/lintcode/mathematics/random-number-1-to-7-with-equal-probability.md)
- [Pow(x, n)](https://aaronice.gitbook.io/lintcode/mathematics/powx-n.md)
- [Narcissistic Number](https://aaronice.gitbook.io/lintcode/mathematics/narcissistic-number.md)
- [Rectangle Overlap](https://aaronice.gitbook.io/lintcode/mathematics/rectangle-overlap.md)
- [Happy Number](https://aaronice.gitbook.io/lintcode/mathematics/happy-number.md)
- [Add N Days to Given Date](https://aaronice.gitbook.io/lintcode/mathematics/add-n-days-to-given-date.md)
- [Reverse Integer](https://aaronice.gitbook.io/lintcode/mathematics/reverse-integer.md)
- [Greatest Common Divisor or Highest Common Factor](https://aaronice.gitbook.io/lintcode/mathematics/greatest-common-divisor-or-highest-common-factor.md)