The ARRT does not publish a fixed number of questions you can miss and still pass.
This is because the ARRT uses a scaled scoring system rather than a simple percentage-based grading method.
As a result:
👉 Two candidates can miss a different number of questions and receive the same scaled score.
Why There Is No Exact Number
Many students search for:
“How many questions can I miss?”
Unfortunately, there is no official answer.
The ARRT exam uses:
- Scaled scoring
- Multiple exam forms
- Statistical equating methods
This helps ensure fairness across different versions of the exam.
What Score Do You Need to Pass?
ARRT reports scores on a scaled system.
A scaled score of:
👉 75
is generally considered the passing standard.
This does not mean 75% correct.
It means you achieved the minimum passing performance level established by ARRT.
Why Students Should Stop Focusing on Questions Missed
One of the biggest mistakes students make is trying to calculate:
- Safe number of mistakes
- Passing percentages
- Exact question allowances
This is largely unhelpful.
Instead focus on:
- Consistent practice performance
- Content mastery
- Exam readiness
What Practice Score Should You Aim For?
A good rule:
Below 65%
High risk.
65–75%
Borderline.
75–85%
Generally competitive.
Above 85%
Strong readiness.
Areas Where Students Lose the Most Points
Common weaknesses include:
- Image production
- Radiation protection
- Patient care
- Equipment operation
- Image evaluation
Why Some Students Fail Despite Graduating
Graduation does not automatically mean exam readiness.
The ARRT tests:
- application
- analysis
- decision-making
not simple memorization.
Final Insight
There is no magic number of questions you can miss.
The better question is:
👉 Are you consistently performing at a passing level on realistic practice exams?
That’s what predicts success.
