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

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## Calculate the number 1306

NUMBERMANIA: Calculate the number 1306 using numbers [1, 8, 2, 5, 30, 388] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

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

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

## Find number abc

If 6acab - ac10b = b84a0 find number abc. Multiple solutions may exist.Correct answers:

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

**Nílton Corrêa De Sousa**.#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:

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

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

## What is the missing number?

What is the missing number?Correct answers:

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

**Chandu Rajyaguru**.#brainteasers #math #riddles

## Calculate the number 5543

NUMBERMANIA: Calculate the number 5543 using numbers [5, 1, 2, 5, 52, 873] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

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

**Eugenio G. F. de Kereki**.#brainteasers #math #numbermania

## MAGIC SQUARE: Calculate A*B*C

The aim is to place the some numbers from the list (1, 2, 4, 15, 16, 18, 28, 29, 31, 67, 72, 91) 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:

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

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

## Find number abc

If 87c19 - 40ba0 = 4bbb9 find number abc. Multiple solutions may exist.Correct answers:

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

**Fazil Hashim**.#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:

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

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

## Calculate the number 3172

NUMBERMANIA: Calculate the number 3172 using numbers [4, 6, 9, 4, 60, 226] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

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

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

## Find number abc

If c3c48 - 7b785 = aab63 find number abc. Multiple solutions may exist.Correct answers:

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

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