TalentJR apps
50² is 2500, and every square from 41² to 59² follows one neat pattern. Find how far the number is from 50 — the gap. Add the gap to 25 (or take it away below 50) for the first part, then write the gap squared as two digits.
✓ You passed this lesson’s test.
From 25 and the gap — “first part 25 ± gap, last two digits gap²”
Use it for: Areas of squares, Pythagoras and algebra in Class 8–10, and olympiad mental rounds.
Check: 46 × 46 = 46 × 40 + 46 × 6 = 1840 + 276 = 2116 ✓
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 — and beat the clock: finish within 3 min.
🏅 Sign in with Google to earn the 🌟 Fifty Square Star badge when you pass — and a certificate when you finish all 10 lessons of Part 4 · Speed decimals, fractions and percentages. 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.