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Zeroless or not? (Posted on 2014-10-07) Difficulty: 3 of 5
Let the concatenation abc represent the last three digits of the 7th power of randomly chosen 4-digit integer.
Evaluate the probability that at least one of the digits a,b, or c is zero.

Bonus (D4) task: Still addressing the last 3 digits, derive a formula for p(k,l) expressing the probability for the l-th power of k-digit number, l must be prime in respect to 10 , and no less than k.

See The Solution Submitted by Ady TZIDON    
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  Subject Author Date
Solutioncomputer explorationCharlie2014-10-07 10:35:23
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