SOF ICSO Answer Key 2025-26 Out, Download Answer Key OMR PDF

SOF ICSO Answer Key 2025-26 (Out) is a crucial tool for all the candidates who wrote the SOF International Computer Science Olympiad (ICSO) exam. This answer key, released by the Science Olympiad Foundation (SOF), contains the correct option for every question asked in the test. Since the ICSO exam is held on different dates with different question papers (called Sets A, B, and C), the SOF releases a separate SOF ICSO Answer Key for each set. 

SOF ICSO Answer Key Download Link

The SOF ICSO Answer Key for all classes is released in PDF format on the official SOF website. The candidates must check which Set (A, B, or C) was given to them on their question paper and use only that matching answer key.

Steps To Download SOF ICSO Answer Key 2025 PDF

A list of steps has been provided to download the SOF ICSO Answer Key 2025 PDF. 

Step 1: Visit the official SOF website at www.sofworld.org.

Step 2: Click on the “Answer Keys & Cut Off” section on the homepage.

Step 3: Select the ICSO (International Computer Science Olympiad) answer key link.

Step 4: Choose your Set (A/B/C) and Class (1–10).

Step 5: Download the PDF and save it for checking your answers.

Calculate Scores Using ICSO Answer Key

Candidates should follow the marking scheme for calculating the ICSO Answer Key. 

• Compare Answers: Match the answers you marked on your OMR sheet with the correct answers given in the SOF ICSO Answer Key (make sure the Set and Class match).

• For questions in the Logical Reasoning and Computer Science sections, you get 1 mark for each correct answer.

• For questions in the special Achievers Section, you get higher marks (2 marks for Classes 1-4 and 3 marks for Classes 5-10).

• Add up the marks from all the sections. Since there is no negative marking, you do not need to subtract any marks for wrong or unattempted questions.