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Reported Question / Answer
Q.) 75% of a radioactive element decays in 6 hours. Its half life period is __________ hours.
1)
01-06-2015
2)
03-04-2015
3)
4
4)
3
5)
NULL
Answer :
4
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Message / Correct Answer / Suggestion
Human Verification : Answer 2 + 3 = ?
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