Since none of the 5 digits…
Since none of the 5 digits may be a zero (how would the car recognize zero clicks?), only the numbers 1-9 are possible, so there are 9^5 = 59,045 possible combinations.
Since none of the 5 digits may be a zero (how would the car recognize zero clicks?), only the numbers 1-9 are possible, so there are 9^5 = 59,045 possible combinations.