Multiple choice general knowledge

sqare of 85

  1. 7625

  2. 7225

  3. 7325

  4. 7525

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To square 85: 85 x 85 = 7225. You can use (80 + 5)^2 = 80^2 + 2*80*5 + 5^2 = 6400 + 800 + 25 = 7225. Option B is correct. The other options are wrong: 7625 would be 85 x 89.75 approximately, 7325 has no clear pattern, 7525 would be 85 x 88.53.