Real-World Data

Almost Palindromes »

Write a function that finds words that would be palindromes if one of their letters was removed.

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Categories: Computational KnowledgeWords and Linguistics

Contributed by: Christian Woods

Anagram Words »

An anagram is a word or phrase created by rearranging the letters of another word or phrase. Write a function that takes a word and uses the dictionary to return a list of anagrams.

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Categories: Computational KnowledgeWords and Linguistics

Contributed by: Wolfram Research

Antipode above or below Sea Level »

Find whether the antipode of a point on Earth is above sea level.

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Categories: Computational KnowledgeGeography

Contributed by: Greg Hurst

Average Elevation »

Write a function to find the average elevation over a specified latitude.

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Categories: Computational KnowledgeGeography

Contributed by: Christian Woods and Stephen Wolfram

Capital Cities Near a Latitude »

Write a function that finds the capital city closest to a given latitude.

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Categories: Computational KnowledgeGeography

Contributed by: Greg Hurst

Country Chains »

Given two countries, find the length of the shortest chain of bordering countries that connects them.

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Categories: Computational KnowledgeGeography

Contributed by: Greg Hurst

Fewest Number of Coins »

Given a list of values for coins, write a function that finds the fewest number of coins needed to add up to a certain value.

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Categories: AlgorithmsComputational KnowledgeMathematics

Contributed by: Greg Hurst and Stephen Wolfram

Friday the 13ths in a Year »

Write a function to determine how many Friday the 13ths happen in a given calendar year.

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Categories: Computational Knowledge

Contributed by: Christian Woods and Stephen Wolfram

How Round Is a Country? »

Write a function to find out how close the map of a country is to being a disk.

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Categories: Computational KnowledgeGeography

Contributed by: Greg Hurst and Stephen Wolfram

Iterated Roman Numeralization »

Write a function that starts from a number n, finds its representation r in Roman numerals, finds the length of r as a Roman numeral, and continues, stopping just before a number previously in the list comes up again.

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Categories: Computational KnowledgeSequences

Contributed by: Stephen Wolfram

Most Roman Numerals »

Write a function to find the first integer less than n with the longest representation in Roman numerals.

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Categories: Computational Knowledge

Contributed by: Stephen Wolfram

Most Weekend Birthdays »

Write a function to find the birth dates for a child born in a given year that maximize the number of weekend birthdays for ages one to 18.

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Categories: Computational Knowledge

Contributed by: Christian Woods and Stephen Wolfram

Palindromic Roman Numerals »

A palindromic Roman numeral is a number whose Roman numeral representation reads the same in either direction. Write a function that returns all numbers (in decimal) up to an integer n that are palindromic in Roman numerals.

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Categories: MathematicsPeople and HistoryWords and Linguistics

Contributed by: Wolfram Research

Spell with Chemical Elements »

Write a function that takes a string and finds all possible ways to spell it using abbreviations from the periodic table.

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Categories: Computational KnowledgeLists

Contributed by: Christian Woods and Stephen Wolfram