21st Century Skills Logic Puzzles

This is a set of 40 number-based logic puzzles designed to encourage critical thinking in any subject area. This document contains three key components:
1) 40 printable puzzles ideal for printing for individual use or overhead teaching
2) Printable answer key for each puzzle
*3) A teacher's guide explaining the logic behind each puzzle to aid in instruction

These puzzles are perfect for individualized or partner work during warm-ups, lengthened class periods, Fun Friday activities, or as an engaging filler activity if your lesson runs too short!