BRAIN TEASERS
Brain Teasers User Profile

Ioannis Kalogridis

rank
391
points
3
See full ranking list
short ranking list
389. Fabrice Lagouge 3
390. Shoayeb Fahim Akhter 3
391. Ioannis Kalogridis 3
392. Gerardo Guadarrama 3
393. Marija Vojinovic 3
last 3 solved tasks
Film was made in 1941.
3 ducks lay 3 eggs in 3 days. How many eggs will 300 ducks lay in 300 days?
Background picture associated with the solution.

Largest prime number

In 1997, Gordon Spence discovered the largest known prime number, 2^2976221 - 1, the 36th known Mersenne prime number. It took his 100-MHz Pentium PC fifteen days to prove it. At 895,932 digits in length, if printed out the number would stretch for 1.4 miles or if spoken 8 hours a day would take 28 days to complete.

Greeting Card Quest

A little boy had been pawing over the stock of greeting cards at a stationery store.
After a few minutes the clerk became curious and asked, "Just what is it you're looking for, sonny? Birthday greeting? Message to a sick friend? Anniversary congratulations to your mom and dad?"
The boy shook his head, "No."
"Then what kind of card is it that you want?" asked the clerk.
The boy answered wistfully, "Got anything in the line of blank report cards?"

Jokes of the day - Daily updated jokes. New jokes every day.
Follow Brain Teasers on social networks
This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.