The rational number between any two rational numbers a and b is equidistant from a and b is $\frac{1}{2}\left(a+b\right)$ .

If $a,b\left(a<b\right)$ are two rational numbers, then $\text{'}n\text{'}$  rational numbers with equidistance between $a$  and $b$  are $\left(a+d\right),\left(a+2d\right),\left(a+3d\right),\mathrm{....},\left(a+nd\right)$  where $d=\frac{b-a}{n+1}$ .