Find the number of positive integers less than 100,000 whose

Last updated: 7/10/2022

Find the number of positive integers less than 100,000 whose digits are among 1, 2, 3, and 4. Hint: consider the possibilities for 5-digit, 4-digit, 3-digit, 2-digit, and 1-digit numbers and repetition of digits. 1,364 1,024 256