BRAIN TEASERS

enter your answer and press button OK

Which is a winning combination of digits?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.

Correct answers: 75

The first user who solved this task is Sanja Šabović.

#brainteasers #mastermind

Register with your Google Account and start collecting points.

Check your ranking on list.

Doing Nothing

Wife: Whatcha doing?
Me: Nothing.
Wife: You did that yesterday.
Me: I wasn't finished.

Jokes of the day - Daily updated jokes. New jokes every day.

Follow Brain Teasers on social networks

Brain Teasers

puzzles, riddles, mathematical problems, mastermind, cinemania...

First Cepheid photographed in Andromeda

In 1923, Edwin Hubble photographed part of the Andromeda nebula. By 10 Oct 1923, he identified it as showing a faint variable star. On the plate, he crossed out his earlier “N” mark for a nova, and put in large letters, “Var!” for variable. This was a notable discovery. By early next Feb, he had measured the star's changing brightness. This confirmed it was a Cepheid variable star, the first found in the Andromeda nebula. Now he had a way, for the first time, to reliably measure the distance to Andromeda. The rate of variation of a Cepheid identifies its absolute intensity. By comparing that calculated quantity with the observed apparent intensity, the distance could be inferred. Andromeda was far beyond the Milky Way. After getting more data. he notified an AAS meeting with a paper read 1 Jan 1925.«

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.