Question

How many bicycle license tags can you make with four numeral spaces? Use 10 digits and no blank spaces.

400

1,000

10,000

Answer 1

10,000

Explanation:

i used this answer and got it right

Answer 2

10*10*10*10 = 10,000.

Because you can use either of then digits for each space.

Also, you can see that the valid numbers are from 0000 to 9999 = 9999 + 1 = 10,000 numbers.