## Brain Teasers (page 3)puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 21 to 30. |

## MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (12, 13, 19, 29, 30, 36, 47, 48, 54, 73) 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:

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

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

## Find number abc

If 464bc - 250a7 = 2bacb find number abc. Multiple solutions may exist.Correct answers:

**11**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

### On his first day of classes at...

On his first day of classes at a university, a student took a front row seat in a literature course.

The professor told them they would be responsible for reading five books, and that he would provide them with a list of authors from which they could choose.

Then the professor ambled over to the lectern, took out his class notes and began ... "Baker, Black, Brooks, Carter, Cook ... "

The student was working feverishly to get down all the names, when he felt a tap on his shoulder.

The student in back of him whispered, "He's taking attendance."

The professor told them they would be responsible for reading five books, and that he would provide them with a list of authors from which they could choose.

Then the professor ambled over to the lectern, took out his class notes and began ... "Baker, Black, Brooks, Carter, Cook ... "

The student was working feverishly to get down all the names, when he felt a tap on his shoulder.

The student in back of him whispered, "He's taking attendance."

## Calculate the number 3216

NUMBERMANIA: Calculate the number 3216 using numbers [3, 5, 2, 4, 16, 982] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

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

**NĂlton CorrĂȘa de Sousa**.#brainteasers #math #numbermania

## Find number abc

If 3bba4 - 2c008 = 5b8c find number abc. Multiple solutions may exist.Correct answers:

**11**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

## Calculate the number 1125

NUMBERMANIA: Calculate the number 1125 using numbers [5, 4, 3, 3, 43, 125] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

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

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

## MAGIC SQUARE: Calculate A*B-C

The aim is to place the some numbers from the list (4, 7, 8, 14, 17, 18, 32, 36, 39, 40, 84) 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:

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

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

## Find number abc

If abb84 + 4a895 = cca9a9 find number abc. Multiple solutions may exist.Correct answers:

**11**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:

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

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