Replace the question mark with a number
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 454
The first user who solved this task is Roxana zavari.
#brainteasers #math #riddles
Vending machineIn 1884, the first U.S. patent was issued for an automatic liquid vending machine to William H. Fruen of Minneapolis, Minn. (No. 309,219). When a coin was inserted in a slot, a measured quantity of liquid was released from a reservoir. |