Multiple choice

What approximate value should come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.) (17.001)2 + (18.99)2 + (13)2 = (45)2 - ?

  1. 1156

  2. 1186

  3. 1206

  4. 1216

  5. 1308
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

17^2 + 19^2 + 13^2 = 289 + 361 + 169 = 819. 45^2 = 2025. 2025 - 819 = 1206.

AI explanation

Round the numbers to evaluate 17 squared + 19 squared + 13 squared = 45 squared minus the question mark. This gives 289 + 361 + 169 = 2025 minus the question mark. Adding the numbers on the left gives 819, so the question mark equals 2025 minus 819, which is 1206.

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