🕵️♀️ MATH CIRCLE – ACTIVITY 17
Number Detective
📅 DATE: 29-10-2025 🗓️ DAY: Wednesday
Objective:
To strengthen understanding of number properties and divisibility rules through a clue-based reasoning game.
Purpose:
To encourage logical deduction and use of mathematical properties to identify hidden numbers using given clues.
Learning Outcomes:
- Apply divisibility rules for 2, 3, 5, 9, etc.
- Strengthen reasoning through elimination and deduction.
- Recognize relationships between digits and number characteristics.
- Develop and solve peer-created riddles.
Skills Developed:
Analytical thinking, divisibility, logical deduction, creative problem design.
Procedure:
-
Present riddles such as:
“I’m a two-digit number. The sum of my digits is 9. I’m divisible by 3. Who am I?” - Students reason step-by-step to narrow down possible numbers.
- Once familiar, students create their own number riddles for peers to solve.
- Discuss different solving strategies (digit sum, factors, multiples).
Teacher’s Observations:
Students were highly engaged in reasoning out the correct answers. They creatively formed riddles that used multiple number properties together.
Student’s Reflections:
I felt like a detective solving puzzles! It helped me recall divisibility rules and think logically. Making my own riddle was the best part!
– By ____________
Photo Caption:
Students acting as Number Detectives — solving and creating riddles using math clues!
