🕵️‍♀️ MATH CIRCLE – ACTIVITY 17 Number Detective

 

🕵️‍♀️ 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:

1. 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?”
2. Students reason step-by-step to narrow down possible numbers.
3. Once familiar, students create their own number riddles for peers to solve.
4. 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!