1. What is 15 + 9?
2. What is 12 × 8?
3. What is 81 ÷ 9?
4. What is the square of 11?
5. What is 50% of 300?
6. What is √169?
7. Solve: 18 − 7 + 4
8. What is 7 × 7?
9. If x = 4, then x² = ?
10. What is 1000 − 675?
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