## Brain Teasers (page 2)puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 11 to 20. |

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## Calculate the number 539

NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

**10**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 (13, 14, 16, 17, 21, 22, 23, 24, 30, 66, 80) 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:

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

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

## Find number abc

If 6bca8 - 3695a = 2ac9a find number abc. Multiple solutions may exist.Correct answers:

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

**Nílton Corrêa De Sousa**.#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:

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

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

## Calculate the number 1416

NUMBERMANIA: Calculate the number 1416 using numbers [9, 4, 5, 4, 54, 693] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

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

**Thinh Ddh**.#brainteasers #math #numbermania

## Find number abc

If 431ac - 1ba58 = ab8ba find number abc. Multiple solutions may exist.Correct answers:

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

**Nílton Corrêa De Sousa**.#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:

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

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

## Calculate the number 310

NUMBERMANIA: Calculate the number 310 using numbers [4, 4, 1, 1, 28, 278] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

**14**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 (14, 16, 21, 23, 24, 26, 31, 47, 71, 73, 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:

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

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

## Find number abc

If a9aac + 8cc86 = 1b98b6 find number abc. Multiple solutions may exist.Correct answers:

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

**Nílton Corrêa De Sousa**.#brainteasers #math