If $x+4$ is a factor of the polynomial $x^{2}+7x+m$,then $m = $ . . . . . .

The product of $HCF(a, b)$ and $LCM(a, b)$ is equal to:

Express the number $156$ as a product of its prime factors.

For any two positive integers $a$ and $b$,what is the relationship between their $HCF$ and $LCM$? $\text{HCF}(a, b) \times \text{LCM}(a, b) = \text{?}$

Find the $HCF$ and $LCM$ of the following integers by the prime factorization method: $17, 23$ and $29$.

For any positive integer $n$,the last digit of $5^n$ is always.......