Any 3 dots can not make a line
Choose 12 dots such no 3 dots are in the same line[if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75"...
Sum the digits
Can you find D+O+G+C+A+T if you know that
Handshakes
5 friends met for lunch. Each shaked hands with the others one time. How many total handshakes were there?
Three brothers Continued
Ido Elad and Yoav are brothers The sum of the ages of Ido and Elad is 20. The sum of the ages of Elad and Yoav is 15. The sum of the ages...
Three brothers
Elad, Ido and Yoav are brothers with different ages. Exactly one of the following statement is true . 1. Yoav is the oldest. 2. Ido is...
How many squares can Ido draw?
In the dotted grid below, the distances, both horizontally and vertically, between every two neighbouring points are equal. Ido drew all...
