Bash script for reading multiple files

I have multiple R scripts to read (up to 3 i.e. tr1.R, tr2.R, tr3.R).
The bash script for reading a single script is given below

#!/bin/bash
#PBS -l nodes=1:ppn=10,walltime=00:05:00
#PBS -M 
#PBS -m e
module load R/4.0
Rscript ~/tr1.R

I tried the following as suggested by @cas

#!/bin/bash
#PBS -l nodes=1:ppn=10,walltime=00:05:00
#PBS -M 
#PBS -m e
module load R/4.0
**Rscript ~/tr"$i".R**

Further, the job is submitted using

for i in {1..3} ; do
  qsub -o "default.$i.out" -e "errorfile$i" -v i script.sh
done

This couldnot read **Rscript ~/tr"$i".R**.