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

## 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.**25**

**Fazil Hashim**.

## Calculate the number 3040

NUMBERMANIA: Calculate the number 3040 using numbers [6, 9, 2, 7, 71, 319] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**15**

**Nílton Corrêa de Sousa**.

## Find number abc

If b89aa - 2b608 = a13cb find number abc. Multiple solutions may exist.**27**

**Anas Diab**.

### Animal Pictures

One day the teacher decides to play an animal game. She holds up a picture of a giraffe and asks if anyone knows what it is. No one raises his/her hand. The teacher says "See it's long neck? What animal has a long neck?"

Sally holds up her hand and asks if it is a giraffe.

"Very good Sally," the teacher replies. Next she holds up a picture of a zebra. None of the students holds up his/her hands. "See the stripes on this animal? What animal has stripes?"

Billy holds up his hand and says it is a zebra. "Very good Billy," the teacher replies. Next she holds up a picture of a deer. None of the students recognized the animal.

"See the big antlers on this animal. What animal has horns like this?"

Still no one guesses. "Let me give you another hint, it's something your mother calls your father."

Johnny shouts out "I know what it is, it's a horny bastard."

## 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.**42**

**Nílton Corrêa de Sousa**.

## Calculate the number 1190

NUMBERMANIA: Calculate the number 1190 using numbers [8, 6, 8, 5, 20, 615] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**6**

**Nílton Corrêa de Sousa**.

## MAGIC SQUARE: Calculate A*B-C

The aim is to place the some numbers from the list (8, 12, 15, 16, 27, 31, 33, 34, 37, 40) 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.**14**

**Nílton Corrêa de Sousa**.

## Find number abc

If 98015 - ba771 = a12cc find number abc. Multiple solutions may exist.**33**

**Nílton Corrêa de Sousa**.

## 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.**23**

**Nílton Corrêa de Sousa**.

## Calculate the number 8208

NUMBERMANIA: Calculate the number 8208 using numbers [6, 7, 9, 3, 25, 807] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**7**

**Nílton Corrêa de Sousa**.

## Find number abc

If 9a76b + ba769 = acb5bc find number abc. Multiple solutions may exist.**22**

**Nílton Corrêa de Sousa**.