Which of the following is NOT a valid number in base-3?

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Question: Which of the following is NOT a valid number in base-3?

Options:

Correct Answer: 30

Solution:

In base-3, only digits 0, 1, and 2 are valid. \'30\' is invalid.

Which of the following is NOT a valid number in base-3?

Which of the following is NOT a valid number in base-3?

Step 1: Understand what base-3 means. Base-3 is a numbering system that uses only three digits: 0, 1, and 2.
Step 2: Identify the digits that are allowed in base-3. The only valid digits are 0, 1, and 2.
Step 3: Look at the number '30'. Check each digit in '30'.
Step 4: The first digit '3' is not allowed in base-3 because it is greater than 2.
Step 5: Since '30' contains an invalid digit ('3'), it is not a valid number in base-3.

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