Question

5. A safety locker in a jewel shop requires a 4 digit unique code. The code
has the digits from 0 to 9. How many unique codes are possible ?
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Answer 1

Answer:

8 because it start from 1 to 8

Answer 2

Answer:

Total Number of unique codes are possible = 10000

Step-by-step explanation:

Total Number of unique codes are possible = (Possible values for digit 1) x (Possible values for digit 2) x (Possible values for digit 3) x (Possible values for digit 4)

For each digit there are 10 combinations possible from 0-9.

∴ Total Number of unique codes are possible =  10 x 10 x 10 x 10 = 10000