The points P, Q, R, S, T, U, A and B on the number line are such that, TR = RS = SU and AP = PQ = QB. Name the rational numbers represented by P, Q, R and S.

Here,

Distance between U and T is 1 unit

And,

It is divided into three equal parts.

That are:

TR = RS = SU =

Thus,

R =

=

=

S =

=

=

In the same way,

AB = 1 unit

And,

It is divided into three equal parts.

P =

=

=

Q=

=

=