The book solution is ambiguous, I was hoping the community over here could help solve me this!

Thanks!

The book solution is ambiguous, I was hoping the community over here could help solve me this!

Thanks!

you can do with the unit digit method

all you have to do is

list the unit digit of 3

that is 3 = 3, 9 , 7 , 1

and 7 = 7 , 9 , 3, 1

so both have 4 unit digit now

17/4 we get unit digit as 3

13/4 we get unit digit as 7

now add 3 and 4 we get 10 so remainder is zero.

that’s it

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Hey Chimariya,

Learning the unit digit method from the link above.

Thanks!