Multiple choice

How much is ( 140 x 140 ) - ( 139 x 139)?

  1. 19600

  2. 19460

  3. 297

  4. 279

  5. 1

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

This is the right answer. If we multiply both figures and the subtract it we will get 279. 140 x 140 = 19600 139 x 139 = 19321So, 19600- 19321 = 279.