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Project Euler Problem91 #ProjectEuler
Project EulerのProblem91に挑戦しました。 The points P (x1, y1) and Q (x2, y2) are plotted at integer co-ordinates and are joined to the origin, O(0,0), to form ΔOPQ. There are exactly fourteen triangles...
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Project EulerのProblem92に挑戦しました。 A number chain is created by continuously adding the square of the digits in a number to form a new number until it has been seen before. For example, 44 32 13 10 1 1...
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Project EulerのProblem93に挑戦しました。 By using each of the digits from the set, {1, 2, 3, 4}, exactly once, and making use of the four arithmetic operations (+, , *, /) and brackets/parentheses, it is...
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Project Euler Problem94 #ProjectEuler
Project EulerのProblem94に挑戦しました。 It is easily proved that no equilateral triangle exists with integral length sides and integral area. However, the almost equilateral triangle 5-5-6 has an area of 12...
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Project EulerのProblem95に挑戦しました。 The proper divisors of a number are all the divisors excluding the number itself. For example, the proper divisors of 28 are 1, 2, 4, 7, and 14. As the sum of these...
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Project EulerのProblem96に挑戦しました。 Su Doku (Japanese meaning number place) is the name given to a popular puzzle concept. Its origin is unclear, but credit must be attributed to Leonhard Euler who...
View ArticleProject Euler Problem97 #ProjectEuler
Project EulerのProblem97に挑戦しました。 The first known prime found to exceed one million digits was discovered in 1999, and is a Mersenne prime of the form 2^6972593-1; it contains exactly 2,098,960 digits....
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Project EulerのProblem98に挑戦しました。 By replacing each of the letters in the word CARE with 1, 2, 9, and 6 respectively, we form a square number: 1296 = 362. What is remarkable is that, by using the same...
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Project EulerのProblem99に挑戦しました。 Comparing two numbers written in index form like 2^11 and 3^7 is not difficult, as any calculator would confirm that 2^11 = 2048 3^7 = 2187. However, confirming that...
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Project Euler Problem100 #ProjectEuler
Project EulerのProblem100に挑戦しました。 ようやく100問目です。 2010/8/16に第1問目に挑戦し、5/8に100問目到達しました。実に265日かかってます。 300問とか、いつになることやら・・orz、最近ちょっと疲れ気味。 とりあえず、無理せず、気長に進めていければと考えています。 If a box contains twenty-one coloured...
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