For numbers represented using nn hexadecimal digits, how many times more bits (i. e. binary digits) would it take to represent those same numbers?

Using 8 bits of binary number.

Explanation:

Binary numbering system involves just two number digits, they are 0 and 1. They are used to represent digital signals, with 0 as low and 1 as the high value. All digits in the decimal numbering system have a respective binary equivalence.

Hexadecimal numbering system is a numbering with 16 digits, they are, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F. They are used in computers to identify memory location. They also have their binary eqivalence with 4 binary digits representing a single hexadecimal digit. Example;

- CD with the binary equivalence of  1100 1101

- 7B with the binary equivalence of 0111 1011 etc.