Question

Express $256\times 243$ in exponential form.

• A. $2^7\times 3^4$
• B. $2^2\times 3^2$
• C. $2^6\times 3^3$
• D. $2^8\times 3^5$

Answer 1

The correct option is D

$2^8\times 3^5$

We can write:
$256=(2\times 2\times 2\times 2\times 2\times 2\times 2\times 2)=2^8$

$243=(3\times 3\times 3\times 3\times 3)=3^5$

$\therefore 256\times 243=2^8\times 3^5$