NUMBER PUZZLE: Find the miss...
NUMBER PUZZLE: Find the missing number (6, 15, 28, 45, ?)Correct answers: 114
The first user who solved this task is Thinh Ddh.
#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. |