Question

________ is a valid octal number.

285
709
621

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Answer 1

Answer:

285 is the correct answer.

Answer 2

Answer:

621 is a valid octal number.

Explanation:

Octal Number System

The octal number system contains only 8 digits starting from 0 to 7. Any number that is created with the combination of digits ranging from 0 to 7 is a valid octal number.

An important point to remember is that 8 is not included in the octal number system. So, if any digit has 8 in it, then it won't be a valid octal number.

Some examples of valid octal numbers are :

123, 456, 14523, 754, 562 etc.

Advantages of Octal Number System

Following are some of the key advantages of using the octal number system:

• The octal number system uses lesser digits compared to decimal and hexadecimal number systems and more digits than the binary number systems.
• This number system is easy to understand.
• It has fewer complexities and computations. It is also used in digital computer systems.

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