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  • Write all the factors of the following numbers 24 15 21 27 12 20 18 23 36

1. Write all the factors of the following numbers :
(a) 24      (b) 15           (c) 21           (d) 27       (e) 12
(f) 20       (g) 18           (h) 23           (i) 36

Answers (1)

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(a) 24 = 1 \times 24 

          = 2 \times 12 

          =  3 \times 8

          = 4 \times 6 

    Hence Factor of 24 = 1, 2, 3, 4, 6, 8, 12 and 24 itself.        

(b) 15  = 1 \times 15

           = 3  \times 5 

           = 5  \times  3   

Hence factor of 15 = 1, 3, 5 and 15.      

(c) 21 = 1 \times 21 

          =  3  \times  7

          =  7  \times  3     

Hence factor of 21 = 1, 3, 7 and 21.   

(d) 27 = 1 \times 27 

           = 3 \times 9 

           = 9 \times 3 

Hence Factor of 27 are 1, 3, 9 and 27.  

(e) 12=1\times12

         =2\times6

         =3\times4

         =4\times3

Hence Factors of 12 are 1,2,3,4,6, and 12
(f) 20 = 1 \times 20

         = 2 \times 10 

         = 4  \times  5     

         = 5  \times  4

   Hence Factors of 20 are 1, 2, 4, 5, 10, and 20.

(g) 18  = 1  \times 18 

           = 2  \times  9

           = 3  \times 6

Hence Factors of 18 are 1, 2, 3, 6, 9 and 18.        

(h) 23 = 1 \times 23 

          = 23 \times 1

Hence factors of 23 are 1 and 23.         

 (i) 36 = 1 \times 36 

          = 2  \times 18 

          = 3 \times 12 

          = 4 \times 9 

          = 6 \times 6 

Hence factors of 36 are 1, 2, 3, 4, 6, 9, 18 and 36.

Posted by

Pankaj Sanodiya

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