04

Quaternary numeral system is a number system based on four digits: 0, 1, 2, and 3. In the quaternary system, each number is represented by a sequence of 0s, 1s, 2s, and 3s, where each digit represents a certain power of 4. Thus, each digit in the quaternary system is called a "quad", and four quads form a "quartet".

Like other numeral systems, each number in the quaternary system can be represented as a sum of powers of 4, where each power is equal to 4 raised to a certain exponent. For example, the number 103 in the quaternary system is equivalent to 14^2 + 04^1 + 3*4^0 = 19 in the decimal system.

The quaternary system is used in some fields such as coding theory and cryptography. It can also be helpful for educational purposes in teaching and learning about numeral systems.

Number system is a way of representing numbers using certain symbols or digits. Each symbol or digit in a number system represents a specific power of the base of the number system.

In the quinary number system, digits from 0 to 4 are used to represent numbers. Each digit in the quinary number system represents a specific power of the number 5. For example, the number 23 in the quinary number system is written as "23", which means 2×5^1 + 3×5^0 = 13 in the decimal number system.

In the quaternary number system, digits from 0 to 3 are used to represent numbers. Each digit in the quaternary number system represents a specific power of the number 4. For example, the number 103 in the quaternary number system is written as "103", which means 1×4^2 + 0×4^1 + 3×4^0 = 19 in the decimal number system.

The number 4 cannot be represented by a single digit in the quinary number system because it requires the digit 5, which is not a part of this number system. This means that the highest representable number in the quinary number system is 44444, which is equal to 624 in the decimal number system.

Understanding different number systems can be useful for solving various problems in science, technology, and mathematics, as well as for understanding computer systems and programming.