MATH PUZZLE: Can you replace...
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 987
The first user who solved this task is Snezana Milanovic.
#brainteasers #math #riddles
RadiumIn 1902, Pierre and Marie Curie isolated one gram of radium, the first sample of the radioactive element. They had refined it from eight tons of pitchblende ore. |