## 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 432

NUMBERMANIA: Calculate the number 432 using numbers [4, 7, 7, 2, 24, 355] 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 b08c6 - b03a6 = b70 find number abc. Multiple solutions may exist.Correct answers:

**14**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:

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

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

## Calculate the number 7395

NUMBERMANIA: Calculate the number 7395 using numbers [5, 4, 8, 7, 74, 765] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

**4**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, 9, 23, 26, 27, 60, 63, 64, 67, 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:

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

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

## Find number abc

If 46bac + 410c2 = b7bba find number abc. Multiple solutions may exist.Correct answers:

**18**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:

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

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

## Calculate the number 1998

NUMBERMANIA: Calculate the number 1998 using numbers [7, 7, 4, 1, 37, 252] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

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

**Fazil Hashim**.#brainteasers #math #numbermania

## Find number abc

If aac0b - a0c71 = 19c7 find number abc. Multiple solutions may exist.Correct answers:

**19**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:

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

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