Question

Find the digit at the unit place of the number 72019
2019​

Answer 1

answer: the answer will be 3

Step-by-step explanation:

as we know the ones digit of the square of no 7 will be

{7,9,3,1}

the cyclicity table for 7 is as follow

7^1 = 1

7^2 = 49

7^3 = 343

7^4 = 2401

so, the answer will be one of them.

if we divide 2019/4 3 the remainder will be 3

thus, the