Question

$(152{)}_k=(86{)}_{10}$, then k = ?

• A. 6
• B. 7
• C. 8
• D. 9

Answer 1

The correct option is B 7

$(1\times k^2)+(5\times k^1)+(2\times k^0)=86$
$\therefore k^2+5k+2=86$
Using options, k = 7