Mathematics · Permutations and Combinations
A 6-digit security code is made using digits from 0 to 9. The first and the last digits are known. If the remaining four digits are known to be prime numbers (chosen from the single-digit primes 2, 3, 5, 7), at most how many trials are required to determine the correct code?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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256
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