Question

please answer fastly .

explain how?

Answer 1

hey mate

here is your answer

if 7^n be the number given

where n is given

then

we know that 7^1=7
7^2=49
7^3=343
7^4=2401

so if n is divided by 7 completely then remainder=0
the number ends with 7

similarly it ends with 9 if remainder is 1
and it ends with 3 when remainder is 2
and it ends with 1 when remainder is 3

so in this case n=25
so the number must end with 9
so 9-7=2 is the correct answer.

Answer 2

I don't know tomorrow I will answer