Let's write the given statements as mathematical sentences:

1. Ten is the square root of 100.

   $10 = \sqrt{100}$

2. Ten is greater than 9.

   $10 > 9$

3. Ten is an even number.

   $10 \in \{2n \mid n \in \mathbb{Z}\} \quad \text{or simply} \quad 10 \mod 2 = 0$

4. Ten is a multiple of 5.

   $10 = 5 \times 2 \quad \text{or simply} \quad 10 \mod 5 = 0$

Would you like further details or have any questions?

Here are 5 related questions to expand your understanding:

1. How would you express "Fifteen is a multiple of 3" as a mathematical sentence?
2. How can you write "Twelve is less than or equal to thirteen" in mathematical notation?
3. What is the mathematical representation for "Seven is a prime number"?
4. How would you denote "Four is an odd number" using mathematical symbols?
5. How can "Twenty-five is a perfect square" be expressed mathematically?

Tip: When writing mathematical sentences, always look for keywords like "greater than," "less than," "multiple of," and "square root" to guide your use of appropriate mathematical symbols and notation.