Question

If 5 divides integer p and 5does not divide integer r then
a) 5 divides (p+r)
b) 5 divides (p-r )
c) 5 does not divides p+r
d) 5 does not divides (pr)
Please tell the answer by step by step explaination​

Answer 1

Answer:

c)5 does not divides p+r

Step-by-step explanation:

For eg. if p=10 and r=8 then,

p+r= 18 which is not divisible by 5.

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Answer 2

Answer:

c. 5 does not divides p+r

Step-by-step explanation:

Let us take p as a number divisible by 5 (say 10)

Now let r be a number not divisible by 5(say 2)

Now proving point c. that is 5 does not divide p+r

p+r = 10 +2

=12......which is not divisible by 5

Again if you take p=5 and r=4 then

p+r = 5+4

=9(which is not divisible by 5)