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Learning Poster: Divisibility Rules | Mathematics Class 8- New NCERT (Ganita Prakash)

The document Learning Poster: Divisibility Rules | Mathematics Class 8- New NCERT (Ganita Prakash) is a part of the Class 8 Course Mathematics Class 8- New NCERT (Ganita Prakash).
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FAQs on Learning Poster: Divisibility Rules - Mathematics Class 8- New NCERT (Ganita Prakash)

1. What are the basic divisibility rules for the numbers 2, 3, 5, and 10?
Ans. The basic divisibility rules are as follows: - A number is divisible by 2 if its last digit is even (0, 2, 4, 6, or 8). - A number is divisible by 3 if the sum of its digits is divisible by 3. - A number is divisible by 5 if its last digit is either 0 or 5. - A number is divisible by 10 if its last digit is 0.
2. How can the divisibility rule for 4 be applied?
Ans. A number is divisible by 4 if the number formed by its last two digits is divisible by 4. For example, for the number 312, we check the last two digits, which are 12. Since 12 is divisible by 4, the entire number 312 is also divisible by 4.
3. What is the divisibility rule for 6, and how is it determined?
Ans. A number is divisible by 6 if it meets two criteria: it must be divisible by both 2 and 3. First, check the last digit to see if it is even (to confirm divisibility by 2), and then sum the digits to see if that sum is divisible by 3.
4. Can you explain the divisibility rule for 9?
Ans. A number is divisible by 9 if the sum of its digits is divisible by 9. For instance, for the number 729, we add the digits: 7 + 2 + 9 = 18. Since 18 is divisible by 9, the number 729 is also divisible by 9.
5. Why is understanding divisibility rules important in mathematics?
Ans. Understanding divisibility rules is important because they simplify the process of determining factors and multiples, which is essential in various areas of mathematics, including simplifying fractions, finding least common multiples, and solving problems involving integers. These rules help students perform calculations more efficiently and enhance their problem-solving skills.
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Learning Poster: Divisibility Rules | Mathematics Class 8- New NCERT (Ganita Prakash)

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