Can you replace the question...
Can you replace the question mark with a number?Correct answers: 217
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
Cistern cleanersIn 1895, cistern cleaners were patented by black American inventor, R.H. Gray, (No. 537,151). In Aug 1894, he received a patent for a baling press. |