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2x + 5 = 19 → subtract 5: 2x = 14 → divide by 2: x = 7. Correct answer is C (7). Linear equations like this are standard on PERT math. Students must systematically isolate the variable, reinforcing logical reasoning skills essential for algebra and higher math. Mistakes often come from subtracting incorrectly or dividing too early, so a step-by-step approach is best.

✅ That’s Batch 5 (Questions 41–50) complete.

Would you like me to keep rolling into Batch 6 (Questions 51–60) right away?

Excellent ???? Let’s continue with Batch 6 (Questions 51–60) for the PERT Practice Exam by CLI.

Same structure, detailed explanations, and aligned with the three Main Topics.

Here are the Main Topics:

• Mathematics

• Reading

• Writing

Batch 6: Questions 51–60

Option D is concise and error-free. Options A, B, and C all contain redundancy (“returned back,” “repeated again,” “collaborated together”). PERT writing emphasizes conciseness and precision, which are essential in academic and professional writing. Eliminating redundancy strengthens clarity and impact.

Option D is concise and correct. The others include redundant pairs (“returned back,” “repeated again,” “collaborated together”). On PERT, conciseness demonstrates control of standard written English.

Context determines meaning. The sentence lists concrete security measures—encryption and multi-factor authentication—widely recognized as strong protections. Therefore, “robust” means strong and effective (answer C). Options A and B contradict the positive security connotation; D (“temporary”) addresses duration rather than strength. For PERT Reading vocabulary-in-context, use the evidence words around the target term to triangulate meaning. Here, the purpose clause “To protect patient data” and the examples that follow the comma create a definition-by-exemplification: the safeguards are substantial, not flimsy. A solid test tactic is substitution: replace “robust” with each option and read the sentence aloud—only “strong and effective” preserves the logic and tone. Recognizing how writers use specific, real-world examples (encryption, MFA) to clarify general descriptors is essential across academic texts—policy briefs, technical summaries, and research methods sections often rely on this pattern. Finally, note that “robust” in research can also mean resilient across conditions; in security, it usually emphasizes strength against threats—both senses point toward reliability, not weakness or brevity.

Option D maintains parallel gerund forms after “improves”: “writing (clearly), analyzing (arguments), and citing (sources).” Options A–C mix forms (infinitive, noun phrases, gerunds) and create imbalance that reads awkwardly. On PERT, scan items in a series and make sure each shares the same grammatical structure. A quick test: read each item after the verb “improves”—“improves writing…improves analyzing…improves citing”—the pattern aligns in D, signaling correct parallelism.