NEW!

Hexagons Plus 2

Jun 10, 2016, 11:56 PM | by Serhiy Grabarchuk Jr

In a composition of four cubes the outlines of 3 regular hexagons can be spotted. It’s enough to move and/or rotate just…

NEW!

Candies

May 27, 2016, 9:18 PM | by Serhiy Grabarchuk Jr

It was a warm July day. Around 70F in the air. Stephen had an appointment with his dentist today who was 16 miles away. Arriving a bit earlier than…

NEW!

Double Exposure

May 06, 2016, 11:54 PM | by Serhiy Grabarchuk Jr

Nine digits are presented as words – a digit per line. Two digits can be spotted twice in this arrangement – each one when an imaginary straight line is drawn through the centers of respective tiles.

NEW!

Shopping Spree

Apr 29, 2016, 11:58 PM | by Serhiy Grabarchuk Jr

Charlotte spent her morning in downtown. After a delicious cup of hot chocolate at location #102, she visited a perfume salon at location #56 across the street. She then stepped into…

NEW!

Triangle to Square

Apr 15, 2016, 3:53 PM | by Serhiy Grabarchuk Jr

Suppose you have a shape of an equilateral triangle with straight sides. Using only a pencil and the triangle as a ruler it is possible to draw a…  

NEW!

The KC Office Puzzle

Mar 18, 2016, 11:23 PM | by Serhiy Grabarchuk Jr

A floor planner wants to minimize the total distances for the company’s employees to the floor’s Kitchen. What is the reachable limit?

NEW!

SketchFrame

Mar 03, 2016, 11:57 PM | by Serhiy Grabarchuk Jr

Can you sketch a shape which should go instead of the question mark in order to complete the sequence?

NEW!

Close Numbers

Feb 18, 2016, 8:20 PM | by Serhiy Grabarchuk Jr

A certain number should be placed in one of the empty cells of the grid in order to complete the pattern. In which row should it go?

NEW!

Changing the Total

Feb 11, 2016, 11:14 AM | by Serhiy Grabarchuk Jr

Eleven matchsticks are arranged into two digits: 6 and 3, resulting in three numbers: 6, 3, and 63. Their total is 6 + 3 + 63 = 72. It is possible to move…  

NEW!

Parent Committee

Feb 04, 2016, 12:59 AM | by Serhiy Grabarchuk Jr

Sitting in a circle, eight parents were discussing their children’s class issues. Parents were of 4 different professions…

NEW!

The ATM Dilemma

Jan 20, 2016, 1:26 AM | by Serhiy Grabarchuk Jr

Frank and Grant just bet: were there more odd-numbered or even-numbered presidents on US banknotes up to $100? Jeff happened to know all presidents by their numbers but…

NEW!

The Frozen Mail

Jan 13, 2016, 1:27 AM | by Serhiy Grabarchuk Jr

A good fairy of Arendelle sent a special message to someone of the kingdom’s dwellers. Who happened to be the addressee?