I want for test I want invest 100$ what is your suggestion

For a test, investing $100 in the stock market with a 5% interest rate can be a simple way to understand the basics of investing. Here's a suggestion for your test:

1. **Choose a Low-Risk Investment**: Since this is a test, you might want to start with a low-risk investment to get familiar with the process. Consider a high-yield savings account or a Certificate of Deposit (CD), which are safer than stocks but still offer a guaranteed return.
2. **Consider a Stock ETF**: If you're interested in the stock market but want some diversification, you could invest in a low-cost Exchange-Traded Fund (ETF) that tracks a broad market index. This can help you get exposure to multiple stocks with a single investment.
3. **Invest in a Dividend ETF**: Another option could be to invest in a dividend-focused ETF. This can provide a steady stream of income through dividends, which can be a good way to start learning about the income potential of investments.
4. **Avoid Speculative Investments**: It's important to avoid speculative investments or those based on hype. Instead, focus on well-established companies or funds with a proven track record.

Remember, investing always carries some level of risk, and it's important to do your research or seek advice from a financial professional before making any investment decisions.