Advanced MathEasy–MediumAmount after two half-lives
Advanced Math practice question
A sample of a substance has a mass of 200 grams. Its mass halves every 3 days. What is its mass, in grams, after 6 days?
Answer: 50
6 days is two halvings: 200 → 100 → 50.
Common wrong answers
- If you answered 0
- Halving never reaches 0.
- If you answered 25
- 25 is after 9 days.
- If you answered 100
- 100 is after 3 days.
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