## Brain Teasers (page 3)puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 21 to 30. |

## 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.**18**

**Nasrin 24 T**.

## Calculate the number 2725

NUMBERMANIA: Calculate the number 2725 using numbers [7, 9, 3, 5, 18, 312] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**6**

**Fazil Hashim**.

## Find number abc

If c79c3 - baabb = 9bbc find number abc. Multiple solutions may exist.**19**

**Nílton Corrêa de Sousa**.

### Marriage Counseling

A husband and wife came for counselling after 25 years of marriage. When asked what the problem was, the wife went into an angry tirade listing each and every problem they had ever had in the 25 years they had been married.

She went on and on: neglect, lack of intimacy, emptiness, loneliness, feeling unloved and unloveable, a long list of unmet needs she had endured over the course of their quarter century of marriage.

Finally, after allowing this to go on for a sufficient length of time, the therapist stood up, walked around his desk and, asking the wife to stand, embraced her and kissed her passionately on the mouth.

The woman shut up and, in a daze, quietly sat down;. The therapist turned to the husband and said, "This is what your wife needs at least seven times a week. Do you think you can do this?"

The husband thought for a moment and replied, "Well, Doc, I can drop her off here on Mondays and Wednesdays, but on the other days I play golf."

## 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.**22**

**Nílton Corrêa de Sousa**.

## Calculate the number 695

NUMBERMANIA: Calculate the number 695 using numbers [1, 7, 7, 3, 45, 647] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**10**

**Nílton Corrêa de Sousa**.

## MAGIC SQUARE: Calculate A*B-C

The aim is to place the some numbers from the list (10, 12, 13, 14, 15, 17, 32, 33, 35, 37, 74, 92) 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 c7aac + 913a3 = 1b8cb8 find number abc. Multiple solutions may exist.**20**

**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.**19**

**Nílton Corrêa de Sousa**.

## Calculate the number 3112

NUMBERMANIA: Calculate the number 3112 using numbers [8, 7, 6, 6, 60, 402] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**8**

**Nílton Corrêa de Sousa**.

## Find number abc

If 759ab - cc620 = ababb find number abc. Multiple solutions may exist.**19**

**Nílton Corrêa de Sousa**.