843219 to the power of 100 is multiplied out,what is its units digit?
Accepted Solution
A:
Answer:1Step-by-step explanation:We will consider only the last digit multiplication and the pattern.When we multiply 843,219 with 843,219, we have9 * 9 = 81 [1 is important]1 * 9 = 99 * 9 = 81 [1 is important]So when we multiply them out with each other, we have a pattern of9, 1, 9, 1 ... goes onSo if we multiply 100 times, what will be the last digit of the series 9, 1, 9, 1 .... it will be 1hence, last digit is 1