The digits of every number in the 9 times table add up to a number in the 9 table: 72 → 7 + 2 = 9, 315 → 3 + 1 + 5 = 9, 7623 → 18. A magician uses this to find a digit a friend has hidden.
Work it out in your head or on paper, then tap your answer — or type it and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
🏁 Trick 10 test
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
✨ Digit Sum Sorcerer badge when you pass — and a certificate when you finish all 5 tricks of
Part 2 · Number magic. You can still take the test without signing in.
👩🏫 Maths tricks classes — live online, request a call back
Prefer a real teacher? TalentJR teachers take live online classes anywhere in India. Tell us what
you need and our team will call you with timings and fees.
💻Live online classesSmall groups or 1:1 with a teacher, from home, any city.
📞We call you backOur team asks what your child needs, then shares timings and fees.
🏠Home tutor?We are still building our list of home tutors — ask on the call if there is one near you.
