Zebra Logic Master

You're John Zebra, a Physics student, and you want Dr. Einstein to be your academic advisor.

However, Dr. Einstein always challenges those interested students to solve his test, which only 2% of the world population is able to do it.

So you decide to start training solving tests similar to what he proposes.

Features:

English and Portuguese languages; 5 slots to save your progress; Stopwatch to mark your time; 15 "Einstein's Riddle" challenge style.