Practice Test GeeksGCE O-Level Practice Test

O-LEVEL Cheat Sheet 2026

The 30 highest-yield O-LEVEL facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

100 questions
120 min time limit
50% to pass
  1. What is the name of the process where plants lose water through their leaves? → Transpiration
  2. Carriage inwards is included in which financial statement section? → Trading account
  3. What is Singapore's approach to water security? → The Four National Taps: local catchment, imported water, NEWater, and desalination
  4. A 60 W bulb is used for 5 hours. How much energy does it consume? → 1080 kJ
  5. What is the name of the process by which a solid changes directly into a gas? → Sublimation
  6. What is the process by which water moves from an area of high water potential to low water potential through a semi-permeable membrane? → Osmosis
  7. Which type of reaction releases heat energy to the surroundings? → Exothermic
  8. What does 'inferring' mean in reading comprehension? → Making a logical conclusion from clues in the text
  9. Who was Singapore's first Prime Minister? → Lee Kuan Yew
  10. What type of reaction is: CH₄ + 2O₂ → CO₂ + 2H₂O? → Combustion
  11. What is lg (logarithm base 10) of 1000? → 3
  12. What is soil erosion? → The removal of topsoil by wind, water, or human activity
  13. What is the function of the People's Association (PA) in Singapore? → To foster community bonding and social integration
  14. What is the primary cause of coastal erosion? → Wave action, chemical weathering, and human activities
  15. Accrued expenses are shown on the Balance Sheet as: → Current liabilities
  16. In electrolysis, where does oxidation occur? → At the anode
  17. What was Raffles' role in Singapore's colonial history? → He founded the British trading post in Singapore in 1819
  18. The probability of an event is 0.35. What is the probability that the event does NOT occur? → 0.65
  19. What colour is the precipitate formed when iron(III) ions react with sodium hydroxide? → Rust/brown
  20. What does an ammeter measure? → Current
  21. Which punctuation mark is used to introduce a list? → Colon
  22. What is the derivative of y = 3x⁴ - 2x² + 5? → 12x³ - 4x
  23. When a business purchases goods on credit from a supplier, which double entry is recorded? → Debit Purchases, Credit Creditors
  24. What is the function of the diaphragm in breathing? → Contracts and relaxes to change chest volume
  25. What is the function of an apostrophe in 'the teacher's book'? → To show possession
  26. What is the oxidation state of oxygen in most compounds? → -2
  27. What is the connotation of the word 'thrifty'? → Positive — it implies being careful with money
  28. Which vitamin is produced by the skin when exposed to sunlight? → Vitamin D
  29. Find the value of x: 5(x - 2) = 3x + 4 → 7
  30. Which colour of visible light has the highest frequency? → Violet
Turn these facts into recall:
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How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. file.go.gov.sg — Retake policy · verified Nov 2026
  2. seab.gov.sg — Passing score, score release, test delivery, eligibility, fees, registration · verified Nov 2026