What is the missing number?MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 67
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
Moon photographedIn 1840, Englishman John William Draper took the first successful photo of the Moon. He made a daguerreotype, a precursor of the modern photograph.Image: another daguerreotype from 1851, the earliest surviving moon image.