GMAT Practice Question Set #51 (Question 151-153)

Problem Solving Question #152: Hacking a Password  
Time 0 0 : 0 0 : 0 0

A computer hacking software can attempt 60 password logins in one second into Ionex's user
database.What is the maximum amount of time it would take for this hacking software to hack into
Ionex's comptuer system given that it requires a 5 character numeric password where no digit can
repeat?

(A)

100

(B)

180

(C)

364

(D)

504

(E)

544

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