Answer:
Explanation:
You want the least and greatest of the counting numbers that have the same number of digits in their base-8 and base-4 representations.
Ranges
The minimum 1-digit number will be 8^0 = 1. The maximum 1-digit number will be 4^1 -1 = 3.
The minimum 2-digit number will be 8^1 = 8. The maximum 2-digit number will be 4^2 -1 = 15.
The minimum 3-digit number will be 8^2 = 64. The maximum 3-digit number will be 4^3 -1 = 63. There are no qualifying 3-digit numbers.
The minimum number is 1.
The maximum number is 15 = 17₈ = 33₄.
__
Additional comment
The 11 numbers are 1–3 and 8 = 10₈ = 20₄ to 15 = 17₈ = 33₄.