TalentJR apps
The key to average puzzles is the total: average × how many numbers = total. When a number is taken away or added, compare the totals before and after — the difference is the number.
✓ You passed this topic’s test.
Think in totals — “turn every average into a total, work with the totals, then divide”
Use it for: Marks, cricket scores, ages and every average question in Class 6–10.
Check: 112 + 38 = 150 and 150 ÷ 5 = 30 ✓
Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the 📊 Mean Machine badge when you pass — and a certificate when you finish all 6 topics of Part 3 · Class 8–10. You can still take the test without signing in.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
Sign in with Google to ask Free — 20 questions a day.
Prefer a real teacher? TalentJR teachers take live online classes anywhere in India and visit homes in selected cities. Tell us what you need and our team will call you with timings and fees.