KNOWING OUR NUMBERS Factors and Multiples Even Numbers
KNOWING OUR NUMBERS ØFactors and Multiples – ØEven Numbers – Numbers which have digits 0, 2, 4, 6, 8 at their once place are called Even Numbers. Ø Odd numbers - Numbers which have digits 1, 3, 5, 7, 9 at their once place are called Even Numbers.
KNOWING OUR NUMBERS ØFactor – A Factor of a given Number is a g number which divides the number without leaving a remainder. Ø Prime factorization : - Prime factorization is the method in which any given number is expressed as the product of prime factors only. ØThere are two methods to find prime factorization – Tree Method and Division Method.
KNOWING OUR NUMBERS Properties of Factors – 1 is the smallest factor of every number The largest factor of a number is the number itself The factors of a number are always smaller than or equal to the number Every number has at least two factors , that is 1 and the number itself.
KNOWING OUR NUMBERS ØProperties of Factors – Ø Common Factor – A number that is factor of two or more numbers is called a common factor
KNOWING OUR NUMBERS ØMultiples – The product of two or more numbers is a multiple of the number that are multiplied
KNOWING OUR NUMBERS ØProperties of Multiples – Ø The smallest multiple of a number is the number it self Ø Every number is multiple of 1 and itself Ø The multiples of a number are equal to or greater than the number Ø There are infinite multiples of a given number Ø The multiples of even number is even Ø The multiples of odd numbers are alternately odd and even numbers
KNOWING OUR NUMBERS ØCommon Multiples – A number that is a multiple of two or more numbers is called a common multiple of those numbers
KNOWING OUR NUMBERS 1. Express the following as the sum of two (i) odd numbers, (ii) even numbers: a. 72 b. 50 c. 158 d. 2046
KNOWING OUR NUMBERS 2. Write all the factors of the following : a. 60 b. 75 c. 36 d. 144
KNOWING OUR NUMBERS 3. Write the first five multiples of the following: a. 19 b. 21 c. 73 d. 47
KNOWING OUR NUMBERS 4. Write the common factors of the following: a. 20 and 36 b. 36 and 60 c. 15 and 45 d. 12 and 18
KNOWING OUR NUMBERS 5. Write first two common multiples of the following : a. 3 and 5 b. 6 and 4 c. 5 and 4 d. 15 and 45
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