Divisibility rules(7)

1.Divisibility rule of 7:-


       

           161➝16-1×2=14, it is divisible by 7,                 
              so 161 will be divisible by 7.

             273⟶27-3྾2=21 it is divisible by 7,
              so 273 will be divisible by 7.


             581➝58-1×2=56 it is divisible by 7,
              so 581 will be divisible by 7. 



   * Which of following numbers are         divisible by 7.
1. 301  2. 378 3.462  4.4501  5.994



* Fill in the blank with suitable number.

a .23*     so it is divisible by 7.

b.56*9     so it is divisible by 7.

c.32*6    so it is divisible by 7.

d.35425* so it is divisible by 7.