## Monthly Archive - November 2021brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10. |

## 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:

**9**#brainteasers #mastermind

## Calculate the number 2394

NUMBERMANIA: Calculate the number 2394 using numbers [8, 6, 1, 8, 84, 265] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

**3**#brainteasers #math #numbermania

## Find number abc

If 731a4 - 70ab0 = 2ac4 find number abc. Multiple solutions may exist.Correct answers:

**14**#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:

**13**#brainteasers #mastermind

## Calculate the number 8638

NUMBERMANIA: Calculate the number 8638 using numbers [7, 3, 7, 5, 99, 815] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

**3**#brainteasers #math #numbermania

## MAGIC SQUARE: Calculate A*B-C

The aim is to place the some numbers from the list (4, 5, 12, 13, 14, 17, 21, 31, 32, 39) 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:

**3**#brainteasers #math #magicsquare

## Find number abc

If 9b80a - 90ac7 = bbbb find number abc. Multiple solutions may exist.Correct answers:

**9**#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:

**13**#brainteasers #mastermind

## Calculate the number 4485

NUMBERMANIA: Calculate the number 4485 using numbers [4, 6, 1, 7, 73, 796] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers:

**5**#brainteasers #math #numbermania

## Find number abc

If 5cb0b - 2b1ba = 2561a find number abc. Multiple solutions may exist.Correct answers:

**10**#brainteasers #math