Manipal MET2017MathematicsPermutation and Combination
When 5²⁰ is divided by 7, the remainder is
Options
- A1
- B3
- C4
- D6
Correct answer
C. 4
Step-by-step solution
Now, 5^2 4( 7) aligned 5^4 & 16( 7)=2( 7) (5^4 )^5 & 2^5( 7) 5²⁰ & 32( 7)=4( 7) aligned Remainder is 4 .