Multiple choice

\text{What approximate value should come at place of question mark (?)} \ ?^2 = 192 \times 73 - 155 \times 44

  1. 82

  2. 89

  3. 79

  4. 80

  5. 85
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Calculate each product: 192 × 73 = 14016 and 155 × 44 = 6820. Subtract: 14016 - 6820 = 7196. Since ?² = 7196, we find ? = √7196 ≈ 84.8, which rounds to approximately 85.

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