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.
#brainteasers #mastermind

### A man goes into a pet shop and...

A man goes into a pet shop and tells the owner that he wants to buy a pet that can do everything. The shop owner suggests a faithful dog.
The man replies, "Come on, a dog?"
The owner says, "How about a cat?"
The man replies, "No way! A cat certainly can't do everything. I want a pet that can do everything!"
The shop owner thinks for a minute, then says, "I've got it! A centipede!"
The man says, "A centipede? I can't imagine a centipede doing everything, but okay... I'll try a centipede."
He gets the centipede home and says to the centipede, "Clean the kitchen."
Thirty minutes later, he walks into the kitchen and... it's immaculate! All the dishes and silverware have been washed, dried, and put away; the counter-tops cleaned; the appliances sparkling; the floor waxed. He's absolutely amazed.
He says to the centipede, "Go clean the living room."
Twenty minutes later, he walks into the living room. The carpet has been vacuumed; the furniture cleaned and dusted; the pillows on the sofa plumped; plants watered. The man thinks to himself, "This is the most amazing thing I've ever seen. This really is a pet that can do everything!"
Next he says to the centipede, "Run down to the corner and get me a newspaper."
The centipede walks out the door. 10 minutes later...no centipede. 20 minutes later... no centipede. 30 minutes later...no centipede. By this point the man is wondering what's going on. So he goes to the front door, opens it... and there's the centipede sitting right outside.
The man says, "Hey!! I sent you down to the corner store 45 minutes ago to get me a newspaper. What's the matter?!"
The centipede says, "I'm goin'! I'm goin'! I'm just putting on my shoes!"
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## Brain Teasers

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### Shakuntala Devi

Died 21 Apr 2013 at age 83 (born 4 Nov 1929).Indian computer and astrologer who demonstrated her gift as an arithmetical prodigy in public performances (beginning at age 6 years old), rapidly computing answers to addition of several up to 13-digit numbers. Using her mental skills, she applied shortcuts using mathematical algorithms, though she could not explain that ability. Her calculations included using large numbers in multiplication and division of large numbers. She also quickly gave square and cube roots, and could name the day of the week for any date in the last century. Examples include taking the cube root of 188,132,517 or naming which days of the week the 14th of each month occurred in 1935. Her skill was one of computation, but she did not have a photographic memory for other facts, and could have memory lapses such as recognizing people met in years past.«
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