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Daily Trivia
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Daily Trivia Archive Day 21 · 2026-04-21
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Day 21
2026-04-21
Correct: 0/5
Question 1/5
Category:
Science & Nature
What is the hardest substance in the human body?
A.
Femur bone
B.
Skull
C.
Toenails
D.
Tooth enamel
Previous: Day 20
Next: Day 22