BRAIN TEASERS

# 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.
The first user who solved this task is Nasrin 24 T.
#brainteasers #mastermind

### And the Winner Is

The father of five children had won a toy at a raffle. He called his kids together to ask which one should have the present.
“Who is the most obedient?” he asked. “Who never talks back to mother?
Who does everything she says?”
Five small voices answered in unison.
“Okay, dad, you get the toy.”

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## Brain Teasers

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

### Fertilizer factory explosion

In 1921, a huge explosion at a fertilizer factory at Oppau, Germany, caused 500 deaths. Destruction at the site included hundreds of neighboring houses. The fertilizer made there since 1917 was a 50/50 mix of ammonium nitrate and ammonium sulphate. Storage silos reached up to a hundred feet high. This fertilizer had a tendency to form solid clumps. It had become routine to break it up ammonium sulphate with bulldozers and dynamite. The mixed fertilizer was not regarded as explosive because it was difficult to initiate and not experienced before in such circumstances. Dynamite used this time caused 4,500 tons of fertilizer to explode, creating a crater 250-ft diam. and 50-ft deep.«
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