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Class 10MathematicsReal NumbersHCF and LCM using prime factorisationHardLevel 11
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If the HCF of two numbers is (18) and their LCM is (378), which statement is correct?

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Answer and explanation

Correct answer: Such numbers are not possible

Step 1: The HCF must exactly divide the LCM. Step 2: Since (378\div18=21), such numbers are possible, so the statement saying impossible is not correct. Step 3: Always check divisibility before deciding validity.

Related tags

Real-NumbersHcf-Lcm-Validity

Frequently asked questions

What is the correct answer to this question?

Such numbers are not possible

Why is this the correct answer?

Step 1: The HCF must exactly divide the LCM. Step 2: Since (378\div18=21), such numbers are possible, so the statement saying impossible is not correct. Step 3: Always check divisibility before deciding validity.

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Real Numbers. Topic: HCF and LCM using prime factorisation.

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  1. 1If the product of two numbers is 3780 and their LCM is 315, what is their HCF?
  2. 2What is the HCF of (18) and (24) using prime factorisation?
  3. 3What is the LCM of (18) and (24) using prime factorisation?
  4. 4What is the HCF of (40) and (60)?
  5. 5What is the LCM of (40) and (60)?
  6. 6What will be the HCF of (45) and (75)?
  7. 7What will be the LCM of (45) and (75)?
  8. 8Which is the HCF of (32) and (48)?
  9. 9Which is the LCM of (32) and (48)?
  10. 10What is the HCF of (27) and (36)?
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