If a number is a multiple of 9 and less than 100, what is the largest such numbe

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Question: If a number is a multiple of 9 and less than 100, what is the largest such number?

Options:

Correct Answer: 81

Solution:

The largest multiple of 9 less than 100 is 81.

If a number is a multiple of 9 and less than 100, what is the largest such number?

If a number is a multiple of 9 and less than 100, what is the largest such number?

Step 1: Understand what a multiple of 9 is. A multiple of 9 is any number that can be divided by 9 without leaving a remainder.
Step 2: List the multiples of 9. Start from 9 and keep adding 9: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.
Step 3: Identify which of these multiples are less than 100. The multiples we listed are: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.
Step 4: Find the largest number in the list that is less than 100. The largest number is 81.
Step 5: Conclude that the largest multiple of 9 that is less than 100 is 81.

Multiples of a Number – Understanding what it means for a number to be a multiple of another number, specifically how to identify multiples of 9.
Inequalities – Applying the concept of being less than a certain value (in this case, 100) to find the largest multiple.
Basic Arithmetic – Performing division and multiplication to find multiples and verify the largest one under a given limit.