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SOF NSO
SOF National Science Olympiad
School-level science olympiad conducted by SOF. 35 questions for Class 1–4, 50 questions for Class 5–12 in Logical Reasoning, Science, and Achievers Section.
Updated 3 Sept 2026 ·Vacancy counts change every cycle — always confirm the exact number in the latest official notification before applying.
Sourced
Source: official exam authority notification · refreshed weekly. How this works →
Free SOF NSO preparation on Shishya
Take expert-curated mocks, practise previous year papers, and Ask Shishya when you're stuck — verified by students who cleared the same path. All free, no credit card. Sign in with Google to begin.
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Verbal ReasoningIf the letters in the word 'CREATIVE' are rearranged in alphabetical order, which letter will be in the 5th position from the left?
Tap an option to check your answer.
డయగ్నోస్టిక్తో ప్రారంభించండి
మీరు ఎక్కడ ఉన్నారో చూడటానికి syllabus అంతటా 10 ప్రశ్నలు.
అధికారిక ఫలితం వచ్చినప్పుడు ఒక ఈమెయిల్, ఇంకేమీ కాదు.
🧩 Build your own mock — pick exact topics → · every mock readable in हिंदी + 12 languages inside the test
SOF NSO — Frequently asked questions
Is Shishya free for SOF NSO preparation?
How many SOF NSO practice questions does Shishya have?
Are SOF NSO previous year question papers available?
How long is the SOF NSO exam?
గత సంవత్సరాల పేపర్లు
100 అన్ని సంవత్సరాల్లో ప్రశ్నలుకొన్ని సంవత్సరాలకు పూర్తి పేపర్ కాదు, ఆ పేపర్లోని కొన్ని ప్రశ్నలు మాత్రమే ఉన్నాయి — ఎన్ని ఉన్నాయో ప్రతి కార్డు చూపుతుంది.
2025
50లో 21 ప్రశ్నలు
ఈ ప్రశ్నలు సాధన చేయండి →2024
50లో 20 ప్రశ్నలు
ఈ ప్రశ్నలు సాధన చేయండి →2023
50లో 20 ప్రశ్నలు
ఈ ప్రశ్నలు సాధన చేయండి →2022
50లో 20 ప్రశ్నలు
ఈ ప్రశ్నలు సాధన చేయండి →2021
50లో 19 ప్రశ్నలు
ఈ ప్రశ్నలు సాధన చేయండి →
Mock tests
నా అన్ని ప్రయత్నాలు →Take any mock in your preferred language — use the language picker inside the mock to switch (Hindi, Telugu, Tamil, Bengali, and 15 more).
SOF NSO — Science Drill
SUBJECT15 ప్రశ్నలు · 20 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Logical Reasoning Drill
SUBJECT15 ప్రశ్నలు · 20 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Achievers Section Drill
SUBJECT15 ప్రశ్నలు · 20 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full Length Practice
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full Mock 1
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full Mock 2
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full Mock 3
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full Mock 4
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full Mock 5
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full Mock 6
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full Mock 7
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full Mock 8
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full Mock 9
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full Mock 10
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →SOF NSO — Full-Length Mock (Real Pattern: 50Q · 60 min)
FULL50 ప్రశ్నలు · 60 నిమి
మాక్ ప్రారంభించండి →
Practice by subject & topic
Full-length subject tests below — 25 questions each, real exam format, instant scoring. Want to drill a single topic? Every topic has its own 10-question test in the syllabus.
Logical Reasoning
120 QsScience
159 QsAchievers Section
41 Qs
🎯 Build my own mock
Tell Shishya exactly what to test you on — topics, size, difficulty — and get a fresh mock in seconds. Leave the box blank and we'll target your weakest topics.
మీ ర్యాంక్
ఈ పరీక్ష తీసుకున్న అందరితో పోల్చితేలీడర్బోర్డ్లో మీరు ఎక్కడ ఉన్నారో చూడటానికి మాక్ తీసుకోండి.
Students
1
Mocks taken
1
Average score
0%
Top score
0%
What can I get from SOF NSO?
Mock-score → expected rank → likely outcome. Use the mocks below to find your current band, then plan how many marks you need to climb.
Top 10 international ranks
95–100% · Post-based exam (no numeric rank)
- •International Rank 1-10 across all participating countries
- •Gold Medal + Winner's Trophy
- •Cash prize ₹50,000-₹1,00,000 for top 3 ranks
- •Laptop/tablet for rank 1 (class-wise)
- •Featured case study in SOF success stories
- •Letter of appreciation sent to school principal
- •Mentorship opportunities and advanced training programs
- •Significant advantage for NTSE, KVPY, and other scholarship exams
Top international ranks
86–94% · Post-based exam (no numeric rank)
International rank holders
71–85% · Post-based exam (no numeric rank)
Zonal merit range
56–70% · Post-based exam (no numeric rank)
School-level recognition
36–55% · Post-based exam (no numeric rank)
Participation level
0–35% · Post-based exam (no numeric rank)
AI-curated from historic cut-off patterns. Always verify with the latest official notification before making decisions.
News & timeline
See older updates →తాజా వార్తలు
SOF has indicated that Level 2 exam dates for ISO, IMO, and IEO will be announced by December 2026, tentatively scheduled for the 2nd or 3rd Sunday of February 2027.
Science Olympiad Foundation has announced three exam dates for ISO Level 1: October 30, November 19, and December 3, 2026. Schools can select one date as per their convenience.
Sample papers released for ISO 2026-27
35 d క్రితంSOF has released sample papers for the ISO 2026-27 exam to help students familiarize themselves with the exam pattern and prepare effectively.
SOF has dispatched Olympiad registration forms to over 99,499 registered schools. Schools must submit registrations at least 30 days before their chosen exam date.
ముఖ్యమైన తేదీలు
🏅NSO 2025-26 Level 2 Exam (Maharashtra)
గడిచిపోయిందిSun, 15 Feb, 2026
Level 2 for Classes 3-12, Maharashtra only
NSO 2025-26 Level 2 result announced
గడిచిపోయిందిSun, 15 Mar, 2026
Level 2 results for 2025-26 cycle released in March 2026
NSO 2025-26 Level 2 Result
గడిచిపోయిందిWed, 18 Mar, 2026
Final results with international and zonal rankings
Registration deadline for Date 1 exam (ISO Level 1)
19 రోజులు మిగిలాయిWed, 30 Sept, 2026
Schools must register at least 30 days before chosen exam date
Registration deadline for Date 2 exam (ISO Level 1)
39 రోజులు మిగిలాయిTue, 20 Oct, 2026
For schools choosing Date 2
🏅Level 1 exam - Date 1
49 రోజులు మిగిలాయిFri, 30 Oct, 2026
Schools may select one of three dates; separate question papers for each date · no key published for this stage
Registration deadline for Date 3 exam (ISO Level 1)
53 రోజులు మిగిలాయిTue, 3 Nov, 2026
For schools choosing Date 3
🏅Level 1 exam - Date 2
69 రోజులు మిగిలాయిThu, 19 Nov, 2026
Schools may select one of three dates; separate question papers for each date · no key published for this stage
🏅Level 1 exam - Date 3
83 రోజులు మిగిలాయిThu, 3 Dec, 2026
Schools may select one of three dates; separate question papers for each date · no key published for this stage
Level 1 result (expected)
126 రోజులు మిగిలాయిFri, 15 Jan, 2027
Results typically released 8 weeks after exam; available at sofworld.org
🏅Level 2 exam (expected)
156 రోజులు మిగిలాయిSun, 14 Feb, 2027
For classes 3-12 only; tentatively 2nd or 3rd Sunday of February; exact date to be announced by December 2026 · no key published for this stage
Level 2 result (expected)
185 రోజులు మిగిలాయిMon, 15 Mar, 2027
Level 2 results typically announced in March; only for classes 3-12
Syllabus
ఏదైనా టాపిక్పై ట్యాప్ చేయండి — నోట్స్ + 10 ప్రశ్నల టాపిక్ టెస్ట్
Logical Reasoning
Verbal Reasoning
Word-based analogy, classification and word formation problems.
Non-Verbal Reasoning
Figure-based pattern, analogy, classification and series problems.
Series Completion
Number, alphabet and figural series — find the missing or next term.
Analogy
Word, number and figural analogy with a common relation.
Coding-Decoding
Letter-letter, letter-number and substitution coding patterns.
Mathematical Operations
Substitute symbols/operators and apply BODMAS to evaluate expressions.
Alphabet Test
Position of letters, alphabet rearrangement and letter-distance problems.
Ranking and Order
Linear arrangement and rank from top/bottom problems.
Blood Relations
Family-tree and pointing-style relationship problems.
Direction Sense
Compass-based movement, shortest distance and final direction.
Missing Characters
Find the missing number/letter inside a matrix or pattern.
Embedded Figures
Identify a smaller figure hidden in a complex figure.
Mirror and Water Images
Mirror and water reflection of letters, numbers and figures.
Paper Folding and Cutting
Predict the appearance of paper after folding, cutting and unfolding.
Cubes and Dice
Cube colouring, opposite faces, dice and counting cubes problems.
Figure Matrix and Patterns
3×3 figure matrices and odd-figure-out problems.
Science
Matter in Our Surroundings
States of matter, change of state, evaporation, latent heat and diffusion.
Is Matter Around Us Pure
Mixtures, solutions, suspensions, colloids and methods of separation.
Atoms and Molecules
Laws of chemical combination, atomic and molecular masses, mole concept.
Structure of the Atom
Sub-atomic particles, Thomson, Rutherford, Bohr models, isotopes and isobars.
Motion
Distance, displacement, velocity, acceleration and equations of motion.
Force and Laws of Motion
Newton's three laws, inertia, momentum and conservation of momentum.
Gravitation
Universal law of gravitation, free fall, mass vs weight, thrust and pressure.
Work and Energy
Work, kinetic and potential energy, conservation of energy and power.
Sound
Production, propagation, characteristics, reflection of sound and echo.
The Fundamental Unit of Life
Cell structure, organelles, prokaryotic vs eukaryotic cells.
Tissues
Plant tissues (meristematic, permanent) and animal tissues (epithelial, connective, muscular, nervous).
Diversity in Living Organisms
Five-kingdom classification and hierarchy of categories.
Why Do We Fall Ill
Health, disease, infectious vs non-infectious diseases and immunization.
Natural Resources
Air, water, soil, biogeochemical cycles and ozone layer.
Improvement in Food Resources
Crop production, animal husbandry and sustainable agriculture.
Chemical Reactions and Equations (Class 10)
Types of reactions, balancing equations, oxidation and reduction.
Acids, Bases and Salts (Class 10)
pH scale, indicators, properties and important salts.
Metals and Non-metals (Class 10)
Physical and chemical properties, reactivity series, corrosion.
Life Processes (Class 10)
Nutrition, respiration, transportation and excretion in plants and animals.
Electricity (Class 10)
Ohm's law, resistance, series/parallel circuits and electric power.
Magnetic Effects of Current (Class 10)
Magnetic field, solenoid, electromagnetic induction and AC/DC generator.
Light — Reflection and Refraction (Class 10)
Mirrors, lenses, refractive index and lens formula.
Our Environment (Class 10)
Ecosystem, food chains, ozone depletion and waste management.
Achievers Section
Higher Order Science Application
HOTS questions applying concepts from the Science section to novel scenarios.
Experimental and Lab Skills
Predicting outcomes of experiments and interpreting lab observations.
Data and Graph Analysis
Reading and inferring from tables, charts and scientific graphs.
Problem Solving
Multi-step numerical and conceptual problems blending two or more topics.
Real-World Applications
Contextual questions linking science concepts to everyday phenomena.