# Euler problems/81 to 90

### From HaskellWiki

BrettGiles (Talk | contribs) m |
m (Corrected the links to Project Euler) |
||

Line 1: | Line 1: | ||

[[Category:Programming exercise spoilers]] | [[Category:Programming exercise spoilers]] | ||

− | == [http://projecteuler.net/index.php?section= | + | == [http://projecteuler.net/index.php?section=view&id=81 Problem 81] == |

Find the minimal path sum from the top left to the bottom right by moving right and down. | Find the minimal path sum from the top left to the bottom right by moving right and down. | ||

Line 8: | Line 8: | ||

</haskell> | </haskell> | ||

− | == [http://projecteuler.net/index.php?section= | + | == [http://projecteuler.net/index.php?section=view&id=82 Problem 82] == |

Find the minimal path sum from the left column to the right column. | Find the minimal path sum from the left column to the right column. | ||

Line 16: | Line 16: | ||

</haskell> | </haskell> | ||

− | == [http://projecteuler.net/index.php?section= | + | == [http://projecteuler.net/index.php?section=view&id=83 Problem 83] == |

Find the minimal path sum from the top left to the bottom right by moving left, right, up, and down. | Find the minimal path sum from the top left to the bottom right by moving left, right, up, and down. | ||

Line 24: | Line 24: | ||

</haskell> | </haskell> | ||

− | == [http://projecteuler.net/index.php?section= | + | == [http://projecteuler.net/index.php?section=view&id=84 Problem 84] == |

In the game, Monopoly, find the three most popular squares when using two 4-sided dice. | In the game, Monopoly, find the three most popular squares when using two 4-sided dice. | ||

Line 32: | Line 32: | ||

</haskell> | </haskell> | ||

− | == [http://projecteuler.net/index.php?section= | + | == [http://projecteuler.net/index.php?section=view&id=85 Problem 85] == |

Investigating the number of rectangles in a rectangular grid. | Investigating the number of rectangles in a rectangular grid. | ||

Line 40: | Line 40: | ||

</haskell> | </haskell> | ||

− | == [http://projecteuler.net/index.php?section= | + | == [http://projecteuler.net/index.php?section=view&id=86 Problem 86] == |

Exploring the shortest path from one corner of a cuboid to another. | Exploring the shortest path from one corner of a cuboid to another. | ||

Line 48: | Line 48: | ||

</haskell> | </haskell> | ||

− | == [http://projecteuler.net/index.php?section= | + | == [http://projecteuler.net/index.php?section=view&id=87 Problem 87] == |

Investigating numbers that can be expressed as the sum of a prime square, cube, and fourth power? | Investigating numbers that can be expressed as the sum of a prime square, cube, and fourth power? | ||

Line 56: | Line 56: | ||

</haskell> | </haskell> | ||

− | == [http://projecteuler.net/index.php?section= | + | == [http://projecteuler.net/index.php?section=view&id=88 Problem 88] == |

Exploring minimal product-sum numbers for sets of different sizes. | Exploring minimal product-sum numbers for sets of different sizes. | ||

Line 64: | Line 64: | ||

</haskell> | </haskell> | ||

− | == [http://projecteuler.net/index.php?section= | + | == [http://projecteuler.net/index.php?section=view&id=89 Problem 89] == |

Develop a method to express Roman numerals in minimal form. | Develop a method to express Roman numerals in minimal form. | ||

Line 72: | Line 72: | ||

</haskell> | </haskell> | ||

− | == [http://projecteuler.net/index.php?section= | + | == [http://projecteuler.net/index.php?section=view&id=90 Problem 90] == |

An unexpected way of using two cubes to make a square. | An unexpected way of using two cubes to make a square. | ||

## Revision as of 13:55, 20 July 2007

## Contents |

## 1 Problem 81

Find the minimal path sum from the top left to the bottom right by moving right and down.

Solution:

problem_81 = undefined

## 2 Problem 82

Find the minimal path sum from the left column to the right column.

Solution:

problem_82 = undefined

## 3 Problem 83

Find the minimal path sum from the top left to the bottom right by moving left, right, up, and down.

Solution:

problem_83 = undefined

## 4 Problem 84

In the game, Monopoly, find the three most popular squares when using two 4-sided dice.

Solution:

problem_84 = undefined

## 5 Problem 85

Investigating the number of rectangles in a rectangular grid.

Solution:

problem_85 = undefined

## 6 Problem 86

Exploring the shortest path from one corner of a cuboid to another.

Solution:

problem_86 = undefined

## 7 Problem 87

Investigating numbers that can be expressed as the sum of a prime square, cube, and fourth power?

Solution:

problem_87 = undefined

## 8 Problem 88

Exploring minimal product-sum numbers for sets of different sizes.

Solution:

problem_88 = undefined

## 9 Problem 89

Develop a method to express Roman numerals in minimal form.

Solution:

problem_89 = undefined

## 10 Problem 90

An unexpected way of using two cubes to make a square.

Solution:

problem_90 = undefined