SSC-IMD-SA-QUANT-MOCK-02 – Question 7

Question:

Find the smallest perfect square that is divisible by both 18 and 50.

वह सबसे छोटा पूर्ण वर्ग ज्ञात कीजिए जो 18 और 50 दोनों से विभाज्य हो।

Options:

  • 900
  • 1,800
  • 4,500
  • 9,000
  • 900
  • 1,800
  • 4,500
  • 9,000

Correct Answer: a)

Explanation:

Prime factorization: \(18 = 2 \times 3^2\), \(50 = 2 \times 5^2\).
LCM = \(2 \times 3^2 \times 5^2 = 450\).
To make it a perfect square, the odd power of 2 must be made even: \(450 \times 2 = 900 = 30^2\).

अभाज्य गुणनखंड: \(18 = 2 \times 3^2\), \(50 = 2 \times 5^2\)।
LCM = \(450\)। पूर्ण वर्ग बनाने के लिए 2 की घात को सम करना होगा: \(450 \times 2 = 900\)। अतः सबसे छोटा पूर्ण वर्ग 900 है।

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