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Question 1 of 314
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30

📝 Without using a calculator, which number is closest to 49 × 21?

Question 2 of 314
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🧪 Which substance has the chemical formula NaCl?

Question 3 of 314
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✍️ A teacher describes a student as "diligent." What does this most likely mean?

Question 4 of 314
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🦁 Which animal sleeps the most each day?

Question 5 of 314
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🩺 Which organ in the human body is primarily responsible for filtering blood?

Question 6 of 314
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🧬 Which organ produces insulin?

Question 7 of 314
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🌡️ Which process returns water vapor from plants to the atmosphere?

Question 8 of 314
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🧬 Which blood type is known as the universal donor for red blood cell transfusions?