MAGIC SQUARE: Calculate A-B-C
The aim is to place the some numbers from the list (8, 9, 12, 22, 23, 26, 49, 69, 70, 73) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A-B-C.Correct answers: 32
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #magicsquare
Ballpen in space
When NASA first started sending up astronauts, they quickly discovered that ballpoint pens would not work in zero gravity.
To combat the problem, NASA scientists spent a decade and $12 billion to develop a pen that writes in zero gravity, upside down, underwater, on almost any surface including glass and at temperatures ranging from below freezing to 300 C.
The Russians used a pencil.