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

## 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.**6**

**Nílton Corrêa de Sousa**.

## 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.**9**

**Nasrin 24 T**.

## Find number abc

If 46bac + 410c2 = b7bba find number abc. Multiple solutions may exist.**21**

**Nasrin 24 T**.

### Private Audience With the Holy Mother

After a long life of unselfish service, Father John O'Malley died and went to heaven. St. Peter met him at the gate and said: "John, you did such a wonderful job for us on earth, we'd like to do something special for you. You name it; it's yours."

John thought for a moment and said: "I'd like a private audience with the Holy Mother." St. Peter told him it would be arranged.On the appointed day, St. Peter escorted John to the Holy Mother's sanctuary. John went before Her, knelt, and said: "Holy Mother, I've always looked to You for guidance, and You have granted me peace and serenity through some difficult times. But I have one question that has nagged me during my whole time on earth. In all the paintings that were done of you, and in all the sculptures that were carved of you, you always looked so sad. Why is that?"

Mary thought for a moment, pursing her lips. She said: "I always wanted a girl."

## 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.**18**

**Nasrin 24 T**.

## 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.**8**

**Fazil Hashim**.

## Find number abc

If aac0b - a0c71 = 19c7 find number abc. Multiple solutions may exist.**25**

**Nasrin 24 T**.

## 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.**14**

**Nasrin 24 T**.

## Calculate the number 9159

NUMBERMANIA: Calculate the number 9159 using numbers [9, 7, 9, 8, 78, 534] 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 (10, 12, 16, 29, 31, 35, 62, 64, 68, 75) 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.**8**

**Nasrin 24 T**.

## Find number abc

If 3a42a + c4ac0 = 10bbba find number abc. Multiple solutions may exist.**22**

**Nasrin 24 T**.