Minimal networkThe following undirected network consists of seven vertices and twelve edges with a total weight of 243.The same network can be represe...
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Web程序 时间：
2016-01-22 17:31:22
阅读次数：
152
Special subset sums: meta-testingLet S(A) represent the sum of elements in set A of sizen. We shall call it a special sum set if for any two non-empty...
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Web程序 时间：
2016-01-20 20:50:12
阅读次数：
242
Pandigital Fibonacci endsThe Fibonacci sequence is defined by the recurrence relation:F[n] = F[n-1] + F[n-2], where F[1] = 1 and F[2] = 1.It turns out...
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其他好文 时间：
2016-01-19 23:32:50
阅读次数：
184
Triangle containmentThree distinct points are plotted at random on a Cartesian plane, for which -1000 ≤ x, y ≤ 1000, such that a triangle is formed.Co...
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其他好文 时间：
2016-01-18 16:09:00
阅读次数：
215
Optimum polynomialIf we are presented with the first k terms of a sequence it is impossible to say with certainty the value of the next term, as there...
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其他好文 时间：
2016-01-17 21:41:46
阅读次数：
232
Anagramic squaresBy 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 rema...
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其他好文 时间：
2015-12-07 22:42:29
阅读次数：
343
Amicable chainsThe 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...
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其他好文 时间：
2015-12-05 20:52:12
阅读次数：
166
Amicable chainsThe 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...
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其他好文 时间：
2015-12-05 00:25:25
阅读次数：
327
Right triangles with integer coordinatesThe points P (x1, y1) and Q (x2, y2) are plotted at integer co-ordinates and are joined to the origin, O(0,0),...
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其他好文 时间：
2015-11-30 22:20:59
阅读次数：
239
Product-sum numbersA natural number, N, that can be written as the sum and product of a given set of at least two natural numbers, {a1, a2, … , ak} is...
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其他好文 时间：
2015-11-29 17:51:10
阅读次数：
263
