Age

Age Order Problems

What you'll learn

Order people by older/younger clues.
Compute age differences from birth order.
Link age to birth year (older person → earlier birth year).
Combine age with ranking in word problems.

Key concepts

Level 1 — Older vs younger

If A is older than B → A's age > B's age.

Level 2 — Age difference

A is 3 years older than B → A = B + 3.

Level 3 — Birth year

Born in 2015 is younger than born in 2013 (same month assumed).

Level 4 — Indian context

Three siblings in Kolkata: elder brother helps younger sister with homework — use age order from clues.

NCERT anchor: CBSE Class 4 logical reasoning — older/younger and age differences

Worked example

Ravi is 2 years older than Sita. Sita is 10. How old is Ravi?

Step 1 — Ravi = Sita + 2.
Step 2 — 10 + 2 = 12.
Answer: **12 years**

A is older than B. B is older than C. Who is youngest?

Step 1 — A > B > C in age.
Answer: **C is youngest**

Common mistakes

Mistake	Why it happens	Fix
Older means smaller age number	Confusing bigger with older	Older → larger age number
Birth year 2016 > 2014 means older	Reversing year rule	2014 birth → older than 2016
Adding when subtracting age diff	Operation error	Older by 3 → add 3 to younger's age
Mixing height and age clues	Wrong attribute	Separate age clues from height

Quick check

A is 5 years older than B. B is 8. A's age?
Oldest of three from A>B, B>C?
2012 birth vs 2015 — who is older?
Stretch: Grandfather is 55 years older than grandson. Grandson is 8. Grandfather's age?

Revision tip: Write ages on a number line — further right = older (larger age).

Open the Practice tab for graded questions on Age Order Problems.

Interactive Exploration Suggestions (Drishti Live Worlds)

Use the platform-native live simulation or PhET-style tool for this topic (number line, Venn, physics playground, molecule builder, sensor dashboard, etc.).
Mirror / body / home activity: physically do the concept (count objects, measure, role-play) and photograph or describe for portfolio.
Voice or text reflection with AI Mentor: explain the concept to a younger student or family member.

AI Mentor Prompts (Socratic, Board-Adaptive)

"Explain this concept to a Class 6 student using one real example from an Indian home, school, market, or festival."
"What is one common mistake students make here, and how would you catch yourself making it?"
Stretch: "How does this connect to coding, robotics, money, health, environment, or a future career?"

Gamification, Portfolio & Parent Visibility

Complete the core practice + one extension activity (photo, table, short reflection, or mini-project) for base XP + topic badge.
5-7 day streak or family discussion note = multiplier + visible artifact in parent/principal dashboard.
Best real-world application stories (anonymised) featured on class or national leaderboard.

Robotics, STEM & Future Skills Bridges

One hands-on project or measurement using the Drishti kit or household items that makes the concept physical.
Direct link to at least one Future Skill track (Money Management, Green Tech, Cyber Defenders, Micro-Entrepreneurship, AI Mastery, Sustainable Living, Personality Development).
Coding extension where relevant (simple script, simulation, or data logging).

NEP 2020 & Full Education OS Alignment

This material emphasises experiential "learning by doing", competency (apply/create/analyse), vocational exposure, critical thinking, and multidisciplinary connections. Designed to feed live worlds, AI Mentor (with memory), gamification, robotics, parent analytics, and future skills — not just exam prep.

Portfolio Evidence Idea: Your photo/table/reflection/project + one sentence on "How this helps me in real life or a possible future path."

Open the Practice tab for aligned questions (easy/medium/hard + case-based) with full AI scaffolding.

See curriculum for cross-links and the full future-skills/robotics chapters.

Age

Age