MATH PUZZLE: Can you replace...
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 286
The first user who solved this task is Thinh Ddh.
#brainteasers #math #riddles
Letter boxIn 1891, Philip B. Downing, inventor, was awarded a U.S. patent for an improvement to the street letter (mail) box. This improvement in the covering and opening of outdoor mailboxes protected mail from both intruders and weather. It is relatively unchanged to this day. (No. 462,093) |