Question

If Rand S are different integers, both divisible by
5, then which of the following is not necessarily
true?
(a) (R-S) is divisible by 5
(b) (R+S) is divisible by 5
(c) (R? + S2) is divisible by 5
(d) (R + S) is divisible by 10z
If consecutivo​

Answer 1

Answer:

d

Step-by-step explanation:

let R=5a , S=5b where a and b are arbitrary constant values

a) R-S = 5a -5b

5(a-b) so it is divisible by 5

b)R+S = 5a + 5b

5(a+b) so it is also divisible by 5

c) R? + S2 = 5a? + 10b

5(a?+2b) so it is also multiple of 5

d)R+S

5a +5b

5(a+b) it is not divisible by 10z unless z is not a rational value with denominator 2 and for rest of the value z is not true