In the ICSE Class 9 Mathematics curriculum, the topic of Indices is introduced to help students understand the concept of expressing numbers in a more compact form using powers or exponents. Here’s a summary of what this topic typically covers:

1. **Introduction to Indices**: Defines what indices are and explains how they are used to represent repeated multiplication in a more concise manner.

2. **Laws of Indices**: Introduces the laws of indices, including:

– Product Law: (a^m times a^n = a^{m+n})

– Quotient Law: (frac{a^m}{a^n} = a^{m-n})

– Power Law: ((a^m)^n = a^{mn})

– Zero Index Law: (a^0 = 1) (for (a neq 0))

– Negative Index Law: (a^{-n} = frac{1}{a^n}) (for (a neq 0))

3. **Simplification of Expressions**: Shows how to simplify expressions involving indices by applying the laws of indices.

4. **Evaluation of Expressions**: Demonstrates how to evaluate numerical expressions involving indices.

5. **Use of Indices in Real-life Situations**: Illustrates practical applications of indices, such as in scientific notation and compound interest calculations.

6. **Solving Equations with Indices**: Introduces equations involving indices and shows how to solve them.

7. **Standard Form**: Introduces standard form (scientific notation) as a way to express very large or very small numbers using indices.

This summary provides a general overview of the topic of Indices in the ICSE Class 9 Mathematics syllabus. Detailed explanations and examples can be found in the textbook and classroom lessons.