What is the units' digit of the following expression (11)^5*(1)^3*(21)^5? Select: A) 0 B) 1 C) 3 D) 5 E) 9
We do not have to do any calculations or find units digit of remaining numbers...   all three terms - 11,1,21 - are ODD and since the PRODUCT contains 1, the units digit of the product will remain 1   1
<result>B</result>
What is the units' digit of the following expression (11)^5*(1)^3*(21)^5?