Question

(i) Check whether (20)" can end with the digit 5
for any natural number n.
(ii) Prove that (12)” cannot end with the digit 0 for
any natural number n.​

Answer 1

Answer:

(i) can't end

(ii) can't end

Step-by-step explanation:

(i)  (20)^n can only end with 0 as the last digit is 0

20 x 20= 400

20 x 20 x 20= 8000

etc....

(ii)  (12)^n cannot end with 0 for any natural no. n as only when any multiple of 2 is multiplied with a multiple of 5 it results in a no.