A system uses a numeric password with 1-4 digits. How many passwords need to be tried before it
is cracked?
A.
1024
B.
10000
C.
100000
D.
1000000
Explanation:
The largest 4 digit number is 9999. So 0000 – 9999 provides 10000 possible
combinations.
Each position has 10 choices so
10*10*10*10
10^4
10,000
0
0