Diophantus was a Greek mathe...
Diophantus was a Greek mathematician who lived in the third century. He was one of the first mathematicians to use algebraic symbols. Most of what is known about Diophantus's life comes from an algebraic riddle from around the early sixth century. The riddle states: Diophantus's youth lasted one sixth of his life. He grew a beard after one twelfth more. After one seventh more of his life, he married. 5 years later, he and his wife had a son. The son lived exactly one half as long as his father, and Diophantus died four years after his son. How many years did Diophantus live?Correct answers: 38
The first user who solved this task is Fazil Hashim.
#brainteasers #math #riddles
A vampire bat came flapping in...
A vampire bat came flapping in from the night covered in fresh blood and parked himself on the roof of the cave to get some sleep.
Pretty soon all the other bats smelled the blood and began hassling him about where he got it.
He told them to go away and let him get some sleep but they persisted until finally he gave in.
"OK, follow me" he said and flew out of the cave with hundreds of bats behind him.
Down through the valley they went, across a river and into a forest full of trees.
Finally he slowed down and all the other bats excitedly milled around him.
"Now, do you see that tree over there?" he asked.
"Yes, Yes, Yes!" the bats all screamed in a frenzy.
"Good" said the bat, "Because I sure didn't!"
Pretty soon all the other bats smelled the blood and began hassling him about where he got it.
He told them to go away and let him get some sleep but they persisted until finally he gave in.
"OK, follow me" he said and flew out of the cave with hundreds of bats behind him.
Down through the valley they went, across a river and into a forest full of trees.
Finally he slowed down and all the other bats excitedly milled around him.
"Now, do you see that tree over there?" he asked.
"Yes, Yes, Yes!" the bats all screamed in a frenzy.
"Good" said the bat, "Because I sure didn't!"