Logic Problems:

Lunchtime Birthdays

Grid-based Logic

Four friends met for lunch in the cafeteria yesterday. They hadn't seen each other in quite awhile and were eager to meet and catch up. During the course of their conversation...

BRYLine:

Advanced 1

Logic: Shapes & Colors

Fill out all the cells in the line with the nine colored shapes, one shape per cell, in accordance with the clues

Geomatrix:

Beginner 2

Geometry & Deduction

Discover which one of the four dots surrounding a given letter is in fact the real one so that when all dots are assigned, all the clues are satisfied

Cut-Outs:

The Quadro-Flex Puzzle

DIY, Hands-on

Cut out the pattern. Pre-crease along the dotted lines. Glue two opposite ends of the pattern into the tube, and... solve a puzzle.

Matchsticks:

5 Squares from 6 Matchsticks

Segment-based geometry, hands-on

Six matchsticks are placed on a table. What is the minimum number of matchsticks to be moved in order to…

Puzzle Stories:

A Hotel Elevator

Deduction, Reasoning, Spatial

A hotel elevator allows no more than 7 people in simultaneously. Several people entered the elevator on the ground floor en route to the top, 40th floor...

Kolocells:

Intermediate 2

Logic: Colors

An arrangement is composed of an even number of circles. Paint each circle in one of the three prime colors in accordance with the clues provided