Multiple choice

What approximate value will come in place of question mark (?) in the following questions?(113 \times 81 - 63 \times 85 = ?^2)

  1. 48

  2. 52

  3. 58

  4. 62

  5. 66

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

Calculate 113 × 81 = 9153 and 63 × 85 = 5355. Subtract to get 9153 - 5355 = 3798. The square root of 3798 is approximately 61.6, which rounds to 62. Option A (48) gives 2304, B (52) gives 2704, C (58) gives 3364, and E (66) gives 4356 - all incorrect.