cumulonimbus wrote:
sudhanshushankerjha wrote:
my ans is D..
18^220 /7 =2^440 /7 = (2^3)^146 * 4 /7 = 4 rem.
18^220 /7 =2^440 /7 = (2^3)^146 * 4 /7 = 4 rem.
Hi Bunnel,
Is the above solution correct?
I didnt get it.
18^220
=2^220 (3^2)^220
={(2^3)^73 * 2^1} {(3^3)^146 * 3^2}
=2*9
=18
which leaves a remainder of 4 when divided by 7
