Which number replaces the question mark?
Solve Mathematical Puzzle: 4, 5, 6, 8, 11, 16, ?, 37, 58, 92Correct answers: 166
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
Street cleaning machineIn 1854, Philadelphia residents were amazed as the first practical street cleaning machine was put into operation this day. A series of brooms attached to a cylinder mounted on a cart was turned by a chain driven by the turning of the cart's wheels. |