Show that 21 to the power n can not end with digit 0,2,4,6 and 8 for any natural number n
Share
Show that 21 to the power n can not end with digit 0,2,4,6 and 8 for any natural number n
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
last digit=1
so 1^ 8=1
so unit digit is 1