2015 · Q7
The digit in the units place of the resulting number of the expression (234)¹00+(234)¹01 is
Elementary MathematicsNumber System
- A6
- B4
- C2
- D0
Explanation
(234)^100 + (234)^101 = (234)^100 x 235. Since 234 = 4 mod 10 and 4^100 ends in 6, the product ends in 6 x 5 = 30, i.e. units digit 0. Hence option (d).