Find the simplest value of 6.25 - 1.961.1.

Answer: Option B

$$\begin{array}{rl}& \frac{6.25-1.96}{1.1}\\ & =\frac{{\left(2.5\right)}^2-{\left(1.4\right)}^2}{\left(1.1\right)}\\ & =\frac{\left(1.1\right)\times 3.9}{\left(1.1\right)}\\ & =3.9\text{ Answer}\end{array}$$