Dreamshire | Solutions 60-69

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Solutions 60-69

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By Mike ⋅ June 10, 2009 ⋅ Post a comment

What is the maximum 16-digit string for a “magic” 5-gon ring?

By Mike ⋅ April 10, 2009 ⋅ Post a comment

Find the sum of digits in the numerator of the 100th convergent of the continued fraction for e.

By Mike ⋅ April 4, 2009 ⋅ Post a comment

Find the value of n ≤ 1,000,000 for which n/φ(n) is a maximum.

By Mike ⋅ April 3, 2009 ⋅ Post a comment

Find the smallest cube for which exactly five permutations of its digits are cube.

By Mike ⋅ April 1, 2009 ⋅ 2 comments

Using an efficient algorithm find the maximal sum in the triangle?

By Mike ⋅ March 30, 2009 ⋅ Post a comment

How many n-digit positive integers exist which are also an nth power?