Q14

Question:

The sum of the squares of three consecutive even numbers is 200. Find the largest number.

तीन लगातार सम संख्याओं के वर्गों का योग 200 है। सबसे बड़ी संख्या कौन सी है?

Options:

  • a) 10
  • b) 12
  • c) 8
  • d) 14
  • a) 10
  • b) 12
  • c) 8
  • d) 14

correct answer : b)

Explanation:

Let numbers be n-2, n, n+2. (n-2)^2 + n^2 + (n+2)^2 = 200. 3n^2+8=200. n^2=64. n=8. Largest = 8+2=10. Wait: 3n^2+8=200 → 3n^2=192 → n^2=64 → n=8. Largest = 10.

n=8, तीन संख्याएँ: 6, 8, 10। 36+64+100=200 ✓। सबसे बड़ी = 10।

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