## The Most Difficult Taskspuzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10. |

## Calculate the number 9157

NUMBERMANIA: Calculate the number 9157 using numbers [7, 5, 3, 2, 32, 758] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**3**

**Nílton Corrêa de Sousa**.

## Calculate the number 1644

NUMBERMANIA: Calculate the number 1644 using numbers [5, 5, 8, 8, 34, 281] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**3**

**Nílton Corrêa de Sousa**.

## Calculate the number 3197

NUMBERMANIA: Calculate the number 3197 using numbers [8, 9, 4, 5, 82, 233] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**4**

**Nílton Corrêa de Sousa**.

### The Ultimate Computer

The Ultimate Computer stood at the end of the Ultimate Computer Company's production line. At which point the guided tour eventually arrived.

The salesman stepped forward to give his prepared demo. 'This,' he said, 'is the Ultimate Computer. It will give an intelligent answer to any question you may care to ask it.'

A smart-aleck who ran a humor mailing list stepped forward and asked, 'Where is my father?'

There was the soft hum of powerful electronic gear going to the task. Panel lights lit and blinked, and within a couple of seconds the laser printer printed out a piece of paper: 'Fishing off Florida.'

The smart-aleck laughed, 'Actually, my father is dead! It was a trick question.'

The salesman, quickly thinking on his feet, replied that he was sorry the answer was unsatisfactory, but as the Ultimate Computer was precise, perhaps a rewording of the question might work better.

The smart-aleck said to the Ultimate Computer, 'Where is my mother's husband?' Again, the hum of the powerful electronic brain filled the room.

After a moment, the laser printer whirred to life. The paper said, 'Dead. But your father is still fishing off Florida.'

## Calculate the number 3898

NUMBERMANIA: Calculate the number 3898 using numbers [8, 2, 5, 6, 75, 852] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**4**

**Nílton Corrêa de Sousa**.

## Calculate the number 1054

NUMBERMANIA: Calculate the number 1054 using numbers [5, 5, 1, 5, 75, 114] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**5**

**Nílton Corrêa de Sousa**.

## Calculate the number 670

NUMBERMANIA: Calculate the number 670 using numbers [6, 3, 6, 6, 21, 377] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**5**

**Nílton Corrêa de Sousa**.

## Calculate 876+876-876

If 123+741-900=2196 and 900+144-876=6569 then 876+876-876=?**5**

**Sanja Šabović**.

## Decrypt hidden message

Can you decrypt hidden message (1C42 92S1 T5B38 OV1 IS B3LT5B38S 1C4ROVGC4)?**5**

**Sanja Šabović**.

## Find number abc

If 5a12c - 10bcb = c6a81 find number abc. Multiple solutions may exist.**6**

**Nasrin 24 T**.

## Calculate the number 8437

NUMBERMANIA: Calculate the number 8437 using numbers [4, 9, 6, 7, 72, 578] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**6**

**Nílton Corrêa de Sousa**.