What is the digit in the unit's place in the number $\frac{151}{100}$?

Resolve into factors: $(a+b)^{2}-14 c(a+b)+49 c^{2}$.

If $x+a$ is a factor of the polynomial $x^{3}+a x^{2}-2 x+a+4$,then find the value of $a$.

If $\sqrt{x}+\frac{1}{\sqrt{x}}=5,$ what will be the value of $x^{2}+\frac{1}{x^{2}}$?

If $y$ is an integer,then $(y^{3}-y)$ is always a multiple of:

If $x_{1} x_{2} x_{3} = 4(4 + x_{1} + x_{2} + x_{3})$,then what is the value of $\left[\frac{1}{(2 + x_{1})}\right] + \left[\frac{1}{(2 + x_{2})}\right] + \left[\frac{1}{(2 + x_{3})}\right]$?