The L.C.M. of three different numbers is 400. Which of the following number cannot be their H.C.F.?

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MP Vyapam Group 4 (Assistant Grade-3, Stenographer) Official Paper (Held On: 18 July, 2023 Shift 1)
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  1. 16
  2. 20
  3. 25
  4. 45

Answer (Detailed Solution Below)

Option 4 : 45
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MP व्यापम ग्रुप 4 सामान्य हिंदी सब्जेक्ट टेस्ट 1
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Detailed Solution

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Given:

The L.C.M. of three different numbers is 400.

Calculation:

To determine which of these numbers cannot be the H.C.F., we must check which of these numbers do not divide 400.

  • 400 ÷ 16 = 25 (16 is a factor of 400)
  • 400 ÷ 20 = 20 (20 is a factor of 400)
  • 400 ÷ 25 = 16 (25 is a factor of 400)
  • 400 ÷ 45 does not result in a whole number (45 is not a factor of 400)

∴ 45 cannot be the HCF.

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