Video summary

Pembahasan soal ujian seleksi magang Pertamina Hulu Rokan PHR

Main summary

Key takeaways

Educational

Main ideas, concepts, and lessons

  • The video discusses practice questions for the Academic Potential Test (APT) used in the Pertamina Hulu Rokan (PHR) internship selection.
  • It explains the test structure:
    • Online, computer-based exam
    • Conducted in a limited time window
    • Multiple-choice
    • No negative marking: only correct answers earn points
  • The APT material types covered:
    1. Numerical reasoning / numerical questions
    2. Verbal reasoning
    3. Spatial reasoning
    4. English
  • The video mainly walks through numerical reasoning question examples (Questions 1–9), showing how to find the correct options through patterns, algebraic reasoning, and proportion.

Exam methodology (time & scoring)

Exam structure (general)

  • Use the exam time efficiently:
    • 60 questions in 60 minutes
    • Approx. 1 minute per question
  • For scoring:
    • No minus/penalty system
    • Score counts only correct answers

Numerical reasoning practice approach (step-by-step)

Pattern / series questions

  • Identify how terms change, such as:
    • adding/subtracting a constant,
    • alternating operations,
    • group-based operations.
  • Apply the discovered rule to generate the missing terms.
  • Compare the generated value to the multiple-choice options.

Irregular pattern questions

  • Try the most likely transformations:
    • add/subtract,
    • multiply/divide.
  • Validate the result against the answer choices.
  • If the result is not listed, reconsider the operation or grouping.

Story problems (proportion)

  • Set a variable for the unknown.
  • Use proportional reasoning:
    • direct proportionality between quantities (e.g., visitors ↔ sugar needed).
  • Convert the known ratio into an equation and solve.
  • Match the computed value to the correct option.

Fraction / decimal conversion

  • Simplify the fraction first.
  • Convert using an equivalent fraction or a known decimal (e.g., 3/4 = 0.75).

Word problems involving profit and totals

  • Compute total cost:
    • Books cost = (number of books) × (price per book)
    • Pencils cost = (number of pencils) × (price per pencil)
    • Total cost = books cost + pencils cost
  • Compute profit:
    • Profit = percentage × total cost
    • Example: if profit is 20%, calculate 20% of the total cost.

Detailed outline of the numerical questions covered (inferred steps)

Note: Subtitles include some transcription errors; the steps below reflect what the speaker intended.

  • Question 1 (number series completion)

    • Uses a pattern where successive terms change by adding/subtracting a constant.
    • Example reasoning mentioned:
      • one difference computed as -2, repeated across transitions
    • Concludes the missing value corresponds to Option B (16) and later references a resulting value 4.

  • Question 2 (series with tens/units pattern)

    • Interprets the series as decreasing by a constant -2 across groups.
    • Finds the next value aligns with Option D (mentioned as 38 or 36).

  • Question 3 (irregular arithmetic)

    • Tries an operation like +65 and finds a mismatch with options (no 180).
    • Then tries multiplying by 2 and subtracting a constant:
      • uses intermediate results like 230
      • adjusts by -5 to reach an option value
    • Concludes Option E (35).

  • Question 4 (alternating increments/decrements)

    • Mentions adding specific values in steps (e.g., +4, +8).
    • Computes a final term and selects Option B (22).

  • Question 5 (non-regular series using direct difference)

    • Uses computed subtraction steps like -2.
    • Selects Option B.

  • Question 6 (bracketed / nested arithmetic)

    • Mentions powers and operations (subtract/divide, then continue subtracting).
    • Computes an intermediate value, then applies a repeating -2 adjustment.
    • Concludes Option A (4).

  • Question 7 (recognizing cubes / perfect powers)

    • Identifies terms as perfect powers, such as:
      • (3^3 = 27), (4^3 = 64), (5^3 = 125)
    • Uses the next cube term to match options.
    • Concludes Option A.

  • Question 8 (proportion story: sugar vs visitors)

    • Given:
      • 10 visitors require 200 grams sugar
    • Next day:
      • visitors increase by 5 → 15 visitors
    • Proportional calculation:
      • sugar ∝ visitors
      • computes 300 grams
    • Concludes Option B (300 g).

  • Question 9 (fraction to decimal / simplified fraction)

    • Simplifies 9/12 (subtitles briefly mention 9/15, then use 9/12).
    • Simplification:
      • divide by 3 → 3/4
    • Decimal:
      • 3/4 = 0.75
    • Concludes Option C.

  • Question 10 (story: profit from selling goods)

    • Given costs:
      • buys 5 books at 2000 per book
      • buys 8 pencils at 750 per pencil
    • Total cost:
      • books: (5 \times 2000 = 10{,}000)
      • pencils: (8 \times 750 = 6{,}000)
      • total: (10{,}000 + 6{,}000 = 16{,}000)
    • Profit:
      • profit is 20% of total
      • (20\% \times 16{,}000 = 3{,}200)
    • Concludes 3,200.

Speakers / sources featured

  • Primary speaker: the host/creator of the YouTube channel (addressed as “friends”; no name appears in the subtitles).
  • No other specific named speakers or sources appear in the subtitle text.

Original video