Multiple choice

What approximate value should come in place of question mark (?) in the following questions?(142.8\% \text{ of } 240 + 312.5\% \text{ of } 85 = ?^2 + 24^2)

  1. 6

  2. 15

  3. 12

  4. 9

  5. 18

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

142.8% of 240 = 342.72. 312.5% of 85 = 265.625. Left side = 608.345. Right side: ?² + 576. So ?² = 32.345, giving ? ≈ 5.69. Approximating to nearest integer gives 6. Note: 6² = 36, and 36 + 576 = 612, close to 608.345.