TalentJR apps
Numbers below zero are everyday maths: −5 °C on a cold hill night, or a balance of −₹15 when you owe money. Picture a number line. Going warmer or adding money is walking up; going colder or spending is walking down. Crossing zero? Walk to 0 first, then count the rest.
✓ You passed this trick’s test.
Cross zero — “go to 0 first, then count the rest of the steps”
Use it for: Weather reports, hill-station temperatures, money you owe or are owed, and lifts going below the ground floor.
Check: −5 + 9 = 4 ✓
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 🌡️ Zero Crosser badge when you pass — and a certificate when you finish all 10 tricks of Part 4 · Clever counting & checking. 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.