NCERT Solutions for Class 10 Maths Chapter 1 Real Numbers

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Chapter 1 Real Numbers

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Chapter 1 Real Numbers Express each number as product of its prime factors: i 140 ii 156 iii 3825 iv 5005 v 7429 Solution: Concept Insight: Since the given number needs to be expressed as the product of prime factors so in order to solve this problem knowing prime numbers is required. Do not forget to put the exponent in case a prime number is repeating. Question 2 Find the LCM and HCF of the following pairs of integers and verify that LCM × HCF product of the two numbers. i 26 and 91 ii 510 and 92 iii 336 and 54 Solution:

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Concept Insight: HCF is the product of common prime factors raised to least power while LCM is product of prime factors raised to highest power. HCF is always a factor of the LCM. Do not skip verification product of two numbers HCF x LCM as it can help in cross checking the answer.

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