2010 · Q2
What is the last digit in the expansion of 34798 ?
Elementary MathematicsNumber System
- A1
- B3
- C7
- D9
Explanation
3^4798: powers of 3 cycle 3,9,7,1; 4798 mod 4 = 2, so last digit is 9.
What is the last digit in the expansion of 34798 ?
Explanation
3^4798: powers of 3 cycle 3,9,7,1; 4798 mod 4 = 2, so last digit is 9.