Can you find product of four...
Can you find product of four consecutive prime numbers that add up to 220?Correct answers: 38
The first user who solved this task is Erkain Mahajanian.
#brainteasers #math #riddles
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.