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Multiple choice

What approximate value should come at place of question mark (?) in the following questions?(211\times43-156\times17=?^2)

  1. 75

  2. 80

  3. 95

  4. 90

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

Calculate: 211 × 43 = 9073, 156 × 17 = 2652. So 9073 - 2652 = 6421. Now √6421 ≈ 80.1. Among options, 80 is closest.

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