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Here comes an easy one: A Family has several children. Each brother has the same numbers of brothers and sisters, but each sister has twice as many brothers as sisters How many sisters and brothers …

Recently I met a women which said: Do you know something funny? If you reverse my own age, the figures represent my husbands age. He is, of course, senior to me, and the difference between our age is …

A mathematical split: Can you split 34 into two parts such that four-seventh of one of these parts equals two-fifths of the other? This puzzle is from a book so I can't give you a link.

The date $8.8.64$, meaning August $8, \; 1964$ is a very interesting date, because the product first $2$ numbers equals the third. Can you find the year of the twentieth century which gives the maxi …

Mr.Affison had two $10$ quart containers full of wine. He also had a $5$ quart and $4$ quart measurement. All he wanted to do was to put exactly $3$ quarts into $2$ of his measurements.}Now he was s …

A mathematic riddle: If $1+9+8=1$, what is $2+8+9$? I know, many of you out-of-the-box-thinkers, I really like it, but please don't give answers to this riddle as $1=0$ and $9=0$ and $8=1$, that's w …

There is a number-game which you play like this: You think of a number eg. $8$. Then think: How many letters does this number have? In our example: $5$ And now do step one with $5$ This goes on recu …

There is a number, the second digit of which is smaller than the first digit by $4$, and if the number was divided by the digits' sum, the quotient would be $7$. What is this number.

See if you can solve this math-problem: $$ \begin{bmatrix} 1&+&1&=&0\\ 2&+&8&=&2\\ 2&+&2&=&0\\ 9&+&8&=&3\\ 3&+&4&=&0\\ 6&+&9&=&2\\ 0&+&2&=&1\\ 9&+&3&=&? \end{bmatrix} $$ Best of Luck! Ps: Here is the …

If you give me a 5, I give you a 21. If you give me a 6, I give you a 2. If you give me a 7, I give you a 12. If you give me a 10, I give you a 101. What am I processing to get the result? Hint 1 H …