Cubes near 100 and 1000 — Vedic maths trick

The trick

Yavadunam — “whatever the deficiency”

1. Left part: the number + twice the difference.
2. Middle part: 3 × the difference squared.
3. Right part: the difference cubed.
4. Each right-hand part has as many digits as the base has zeros — carry the extra, borrow if a part is negative.

Use it for: Cubes of 91 to 109 and 980 to 1020.

Worked example: 103³ = 1092727

✏️ Practice

Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.

🏁 Trick 27 test

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 🧱 Near-Cube Builder 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.

🖨️ Cubes Near 100 Worksheet

• Worksheet set 1 (PDF)
• Worksheet set 2 (PDF)
• Worksheet set 3 (PDF)