## Monthly Archive - February 2020brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10. |

## 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:

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

**Nílton Corrêa de Sousa**.#brainteasers #mastermind

## Calculate the number 1558

NUMBERMANIA: Calculate the number 1558 using numbers [9, 6, 6, 3, 71, 280] 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, 8, 11, 18, 21, 24, 31, 67, 70, 73, 84, 95) 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:

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

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

### Watch For Fallen Rocks

Driving down a remote road, a motorist sees a sign that says: "Watch For Fallen Rocks."

A couple of miles of careful driving later, he spots some pebbles and stops to pick a few up. Arriving in the next town, the motorist carries the stones into the highway maintenance office.

Placing them on the counter, he says to an official: "Here are your fallen rocks. Now where's my watch?"

## Find number abc

If b1a30 + 6c047 = c0a77 find number abc. Multiple solutions may exist.Correct answers:

**21**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:

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

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

## Calculate the number 3508

NUMBERMANIA: Calculate the number 3508 using numbers [4, 3, 1, 9, 54, 605] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

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

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

## Find number abc

If bc17a - 6a575 = 255cb find number abc. Multiple solutions may exist.Correct answers:

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

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

## 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:

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

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

## Calculate the number 2815

NUMBERMANIA: Calculate the number 2815 using numbers [1, 4, 4, 1, 27, 203] 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

## MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (5, 8, 10, 13, 16, 18, 37, 40, 43, 45, 67) 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