These problems are different.
They use the same math you already know — but wrapped in ways you haven't seen before. There's no rush. Think slowly. Write your reasoning. The answer matters less than HOW you got there.
🎨 Unfamiliar Territory
Using digits 1-9, each exactly once, can you make three 3-digit numbers that add to 999?
Your thinking space:
🔗 Chain Reaction
Pick any number from 1-9. Double it. Add 3. Is the result odd or even? Try 3 numbers. See a pattern?
Show each step:
💬 Explain Your Thinking
Why do we count in groups of 10? What if humans had 8 fingers?
Explain in your own words:
🏆 Olympiad Teaser
I am a number. If you flip me upside down, I become a different number. What numbers could I be?
Think about what constraints the problem gives you. Write down what you KNOW for sure, then work from there. Often, trying small numbers first reveals a pattern.
Your answer and reasoning: