Page 174 - Demo

Arrow-Puffin-4_Semester-1 Maths 173I. Find the common factors of the given numbers.1) 6,8 2) 4,6 3) 8,12 4) 12,16 5) 10,156) 12,18 7) 20,40 8) 21,35 9) 16,24 10) 16,3611) 8,16 12) 24,48II. Find the HCF by common factors method.1) 8,12 2) 16,24 3) 24,36 4) 15,20 5) 72,966) 18,30 7) 21,35 8) 36,81 9) 24,36,60 10) 12,32,3611) 8,12,16 12) 5,15,251 is not a prime number as it has only one factor that is the number itself.2 is only prime number which is even. Rest all the prime numbers are odd.EVEN, ODD, PRIME AND COMPOSITE NUMBERSEven NumbersThe numbers which are multiples of 2 or the numbers which are exactly divisible by 2 are even numbers. For example 2, 4, 6 ... are even numbers as they all are multiples of 2.Odd NumbersThe numbers which are not multiples of 2 or which do not have 2 as a factor, are odd numbers. For example 1, 3, 5, 7 ... are odd numbers.Prime NumbersA number that has exactly two factors is called a prime number. In other words, a number that is exactly divisible only by 1 and itself is called a prime number. Examples : 3 has only two factors, 1 and 3.5 has only two factors, 1 and 5.7 has only two factors, 1 and 7.Let's Understand Conceptual Understanding Let's Practise 5.4 Application