Squares of numbers ending in 5 — Vedic maths trick

The trick

Ekadhikena Purvena — “by one more than the one before”

1. Take the part before the 5 — call it t.
2. Multiply t by the next number: t × (t + 1).
3. Write 25 after it.

Use it for: Squaring any whole number that ends in 5 (15, 45, 105, 195…).

Worked example: 85² = 7225

✏️ Practice

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

🏁 Trick 2 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 🖐️ Square-Five Star badge when you pass — and a certificate when you finish all 10 tricks of Part 1 · Core tricks. You can still take the test without signing in.

🖨️ Squares Ending in 5 Worksheet

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