TalentJR apps
Multiplying by 12 needs no 12 times table: every answer digit is twice a digit plus its neighbour on the right.
✓ You passed this trick’s test.
Sopantyadvayamantyam — “the ultimate and twice the penultimate”
Use it for: Any whole number times 12 — prices by the dozen, months in years.
Check: 23 × 12 = 23 × 10 + 23 × 2 = 230 + 46 = 276 ✓
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 sums. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the 🕛 Twelve Titan badge when you pass — and a certificate when you finish all 10 tricks of Part 3 · Expert tricks. 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.