# Search Tips

**Search for an Exact Phrase**

You may search for an exact phrase by enclosing your query in quotes (e.g. "chapter 2").

**Exclude a Word**

To exclude a term from your search results, enter a minus sign before the word (e.g. apollo -greek -god).

**Search a Specific Web Site**

You may wish to view additional results from a specific Web site. To do this, simply click the "Search this Site" link located next to the initial result.

**Force Inclusion of all Words**

Common words like "what" or "it" may sometimes be ignored by RefSeek. To force the inclusion of a term in your query, enter a plus sign before the word (e.g. lewis +and clark).

**Either/Or Queries**

You may search for two or more queries simultaneously without forcing the inclusion of both in the results by entering OR in caps between each query (e.g. high school calculus OR geometry).

## Calculations

Enter a numeric query into the search field to find instant answers to math expressions or a range of unit conversions (e.g. 5 in binary, 10 pints in liters, how many inches in a foot). An overview of supported math functions follows.

**Basic Math Operators**

Operator |
Function |
Example |

+ | addition | 64 + 32 |

- | subtraction | 28 - 7 |

* | multiplication | 10 * 100 |

/ | division | 27 / 3 |

^ | exponentiation (raise to a power of) | 10 ^ 2 |

**Advanced Math Operators**

Operator |
Function |
Example |

! | factorial | 8! |

% | modulo (finds remainder after division) | 82 % 9 |

sqrt | square root | sqrt(49) |

in | calculates value in new base | 50 decimal in binary |

avg | average | avg(2,5,9) |

min, max | minimum, maximum | min(2 kg,10 pounds) |

abs | absolute value | 12 - 14 |

gcd | greatest common divisor | gcd(100,80) |

lcm | least common multiple | lcm(230,430) |

ln | logarithm base e | ln(15) |

log | logarithm base 10 | log(1024) |

If you haven't found what you were looking for, please send us an email. We're happy to help!