Assertion (A) : For any two natural numbers a and b, the HCF of a and b is a factor of the LCM of a and b. Reason (R) : HCF of any two natural numbers divides both the numbers.

Question

Assertion-ReasonHCF Using Prime Factorisation MethodRelationship Between HCF and LCM of Two NumbersCBSE PYQ

Page 1 of 1

Prove that √2 is an irrational number.

Proof by Contradiction Method

HCF Using Prime Factorisation Method

LCM Using Prime Factorisation Method

Relationship Between HCF and LCM of Two Numbers

Irrationality of Square Root of Prime Numbers

Proof by Contradiction Method

If the HCF of two positive integers a and b is 1, then their LCM is :

The value of (HCF – LCM) for the two numbers 3 and 5 is :

The LCM of two numbers is 3600. Which of the following can not be their HCF ?

Using prime factorisation, find the HCF of 180, 140 and 210.

Using prime factorisation, find the HCF of 144, 180 and 192.