## Monthly Archive - September 2019brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10. |

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## Calculate the number 552

NUMBERMANIA: Calculate the number 552 using numbers [5, 3, 9, 5, 83, 304] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

**9**The first user who solved this task is

**Nílton Corrêa de Sousa**.#brainteasers #math #numbermania

## Find number abc

If abc87 + 25c27 = 67cba find number abc. Multiple solutions may exist.Correct answers:

**17**The first user who solved this task is

**Nasrin 24 T**.#brainteasers #math

## Find the right combination

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:

**12**The first user who solved this task is

**Nasrin 24 T**.#brainteasers #mastermind

### A little old lady answered a k...

A little old lady answered a knock on the door one day, only to be confronted by a well-dressed young man carrying a vacuum cleaner. 'Good morning,' said the young man. 'If I could take a couple of minutes of your time, I would like to demonstrate the very latest in high-powered vacuum cleaners.'

'Go away!' said the old lady. ''I'm broke and haven't got any money!'' and she proceeded to close the door. Quick as a flash, the young man wedged his foot in the door and pushed it wide open. ''Don't be too hasty!'' he said. ''Not until you have at least seen my demonstration.'' And with that, he emptied a bucket of horse manure onto her hallway carpet. ''Now, if this vacuum cleaner does not remove all traces of this horse manure from your carpet, Madam, I will personally eat the remainder.''

The old lady stepped back and said, ''Well let me get you a fork, 'cause they cut off my electricity this morning!

'Go away!' said the old lady. ''I'm broke and haven't got any money!'' and she proceeded to close the door. Quick as a flash, the young man wedged his foot in the door and pushed it wide open. ''Don't be too hasty!'' he said. ''Not until you have at least seen my demonstration.'' And with that, he emptied a bucket of horse manure onto her hallway carpet. ''Now, if this vacuum cleaner does not remove all traces of this horse manure from your carpet, Madam, I will personally eat the remainder.''

The old lady stepped back and said, ''Well let me get you a fork, 'cause they cut off my electricity this morning!

## Calculate the number 2700

NUMBERMANIA: Calculate the number 2700 using numbers [1, 3, 8, 7, 98, 409] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

**6**The first user who solved this task is

**Nílton Corrêa de Sousa**.#brainteasers #math #numbermania

## MAGIC SQUARE: Calculate A+B-C

The aim is to place the some numbers from the list (5, 7, 8, 20, 22, 23, 24, 56, 58, 59, 81) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C.Correct answers:

**9**The first user who solved this task is

**Nasrin 24 T**.#brainteasers #math #magicsquare

## Find number abc

If a7c9c + bacb7 = 939b1 find number abc. Multiple solutions may exist.Correct answers:

**16**The first user who solved this task is

**Nasrin 24 T**.#brainteasers #math

## Find the right combination

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:

**25**The first user who solved this task is

**Nasrin 24 T**.#brainteasers #mastermind

## Calculate the number 1001

NUMBERMANIA: Calculate the number 1001 using numbers [5, 2, 7, 7, 48, 341] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

**8**The first user who solved this task is

**Nílton Corrêa de Sousa**.#brainteasers #math #numbermania

## Find number abc

If 646c7 - 5ac0a = b0cc4 find number abc. Multiple solutions may exist.Correct answers:

**20**The first user who solved this task is

**Nasrin 24 T**.#brainteasers #math

## What a winning combination?

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:

**20**The first user who solved this task is

**Nasrin 24 T**.#brainteasers #mastermind