NCERT Class 6 Maths Chapter 3
Number Play
This chapter engages Class 6 CBSE students with interesting properties of numbers through puzzles, games, and explorations, covering concepts like divisibility rules, multiples, factors, and number patterns. Students develop mental math skills and mathematical curiosity through recreational activities. The chapter deepens understanding of number theory in an enjoyable and interactive way.
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Key Terms
- Factor
- A number that divides another number exactly without leaving a remainder; e.g., 1, 2, 3, 6 are factors of 6.
- Multiple
- A number obtained by multiplying a given number by an integer; e.g., multiples of 4 are 4, 8, 12, 16...
- Divisibility Rule
- A quick method to check whether a number is divisible by another without performing actual division.
- Even Number
- A whole number that is exactly divisible by 2, i.e., its last digit is 0, 2, 4, 6, or 8.
- Odd Number
- A whole number that is not exactly divisible by 2, i.e., its last digit is 1, 3, 5, 7, or 9.
- Magic Square
- A square grid of numbers where every row, column, and diagonal adds up to the same total, called the magic constant.
Frequently Asked Questions
What are divisibility rules in Class 6 Maths Chapter 3?▾
Divisibility rules help quickly check if a number is divisible by another. Key rules: divisible by 2 if last digit is even; by 3 if sum of digits is divisible by 3; by 5 if last digit is 0 or 5; by 10 if last digit is 0.
What are factors and multiples in Class 6 Maths?▾
Factors of a number are the numbers that divide it exactly (e.g., factors of 12 are 1, 2, 3, 4, 6, 12). Multiples of a number are obtained by multiplying it by natural numbers (e.g., multiples of 5 are 5, 10, 15, 20...).
What is a magic square in Class 6 Maths Number Play?▾
A magic square is a grid where numbers are arranged so that every row, column, and diagonal has the same sum (magic constant). For a 3×3 grid using numbers 1-9, each row, column, and diagonal adds to 15.
How do you find all factors of a number in Class 6?▾
To find all factors of a number, divide it by each natural number starting from 1 and check if it divides without a remainder. For example, factors of 24 are: 1, 2, 3, 4, 6, 8, 12, 24 (all numbers that divide 24 exactly).
What is the difference between factors and multiples in Class 6 Maths?▾
Factors are numbers that divide a given number without remainder (factors of 10: 1, 2, 5, 10). Multiples are products when you multiply a number by 1, 2, 3... (multiples of 10: 10, 20, 30...). Factors are always less than or equal to the number; multiples are always greater than or equal.
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