Question

Determinati suma cifrelor numerelor( 5 la puterea 2011 * 16 la puterea 503)

Answer 1

[tex] 5^{2011} *16^{503}= 5^{2011}* 2^{4*503}= 5^{2011}* 2^{2012}= 5^{2011}* 2^{2011}*2= \\ (5*2)^{2011}*2=10^{2011}*2[/tex]
In acest caz suma cifrelor va (2+0+.....+0)=2

Answer 2

$5^{2011} * 16^{503}= 5^{2011} * (2^{4})^{503}= 5^{2011} * 2^{2012}=(5*2)^{2011}*2=$
$=10^{2011}*2=2000000...000000$
suma cifrelor este 2