RRB Group D / RPF Constable Exam > RRB Group D / RPF Constable Videos > Railways Exam Preparation (in Hindi) > Railways Exam || HCF AND LCM || PART- 2
Railways Exam || HCF AND LCM || PART- 2 Video Lecture | Railways Exam Preparation (in Hindi) - RRB Group D / RPF Constable
FAQs on Railways Exam -- HCF AND LCM -- PART- 2 Video Lecture - Railways Exam Preparation (in Hindi) - RRB Group D / RPF Constable
| 1. What is the concept of HCF and LCM in mathematics? |  |
Ans. HCF (Highest Common Factor) and LCM (Least Common Multiple) are fundamental concepts in mathematics. HCF is the largest number that divides two or more numbers without leaving any remainder, while LCM is the smallest multiple common to two or more numbers.
| 2. How can HCF and LCM be calculated? | |
Ans. To calculate the HCF of two or more numbers, we can use methods like the prime factorization method or the Euclidean algorithm. For LCM, we can find the prime factors of each number and then multiply the highest powers of all the prime factors.
| 3. Can HCF and LCM be the same for two numbers? | |
Ans. No, HCF and LCM cannot be the same for two numbers. HCF is always smaller than or equal to the numbers being considered, while LCM is always greater than or equal to the numbers. Therefore, it is not possible for both values to be the same.
| 4. How are HCF and LCM useful in solving mathematical problems? | |
Ans. HCF and LCM are useful in various mathematical problems, especially in areas like fractions, ratios, and proportions. They help in simplifying fractions, finding the least common denominator, and solving equations involving multiple variables.
| 5. Can HCF and LCM be negative numbers? | |
Ans. HCF and LCM are always positive numbers because they represent factors and multiples of given numbers. Negative numbers do not have any factors or multiples, so HCF and LCM are always positive by definition.
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