Overview:
​In Who Am I? puzzles, students use mathematical clues—often involving place value (tens and units)—to identify a mystery number.

​For example, a puzzle stating, "The sum of my digits is 18," requires finding the only two-digit combination that satisfies the rule: 99. By working through these clues, students build essential number sense and practice deductive logical reasoning.
Mathematical Concepts
The Who Am I? puzzles provide practice for the following mathematical concepts:
  • Place value
  • Even and odd numbers
  • Inequalities
  • Multiples and factors
  • Divisibility
  • Prime numbers
  • Squares and square roots
  • Algebraic expressions and factoring​

There are three levels of the Who Am I? puzzles. It is beneficial to start with the beginning level puzzles to gain a basic understanding for the game. After a strong foundation has been built, feel free to choose an appropriate range of puzzles for your students. The levels include:
  • Explorer: focus on place value, even and odd numbers, inequalities, same vs. different, all vs. none, and basic operations (elementary school)
  • Puzzler: focus on Puzzler concepts along with multiples, factors, prime numbers, squares, and simple algebraic rotation (fifth grade and up)
  • Master: focus on Puzzler and Explorer concepts along with more difficult logic, more digits, decimal place values, and absolute value (middle and high school)

Connection to the Math Practice Standards
The Who Am I? puzzles encourage the development of the following mathematical habits of mind:
  • Number sense
  • Reasoning strategically
  • Calculating

Reference
https://solveme.edc.org/whoami/