Find the values of $5^2, 5^3$ and $5^5$ and verify whether $5^2\times 5^3=5^5$

On simplifying the following using the formula $3^{11}\times 3^9$, we get $3^k$.

On simplifying the following using the formula $p^5\times p^8$, we get $p^k$. 

Find the appropriate number in place of the symbol '$?$' in the following. Let '$\mathrm{k}$' be any non zero integer

${\mathrm{k}}^3\times {\mathrm{k}}^4={\mathrm{k}}^{?}$

Find the appropriate number in place of the symbol '$x$' in the following. Let '$\mathrm{k}$' be any non zero integer

${\mathrm{k}}^{15}\times {\mathrm{k}}^x={\mathrm{k}}^{31}$

Compute $3^6$, cube of $3^2$ and verify whether ${\left(3^2\right)}^3=3^6$

If ${\left(2\times 3\right)}^4=k^4$, then the value of $k$ is

Simplification of $x^p\times y^p$using the law of exponent is ${\left(xy\right)}^k$. 

Simplification of $a^8\times b^8$ is ${\left(ab\right)}^k$.