Number-Pair & Triad Classification Tests — Pick a Level and Start
Tap a level to see every test in it. Level 1 is set at real SSC CGL difficulty — start there the day you finish the concept. Level 2 is pitched above the exam, to push accuracy under pressure.
Level 1 SSC CGL Level Checking… View tests
Same difficulty as the real SSC CGL paper — one clear relationship per question. A fixed difference or sum, a fixed multiple, a square or a cube of the first number, the digits reversed or added, and triads where the third number comes from the first two. A steady score here means the chapter is exam-ready.
Level 2 Above SSC CGL Level Checking… View tests
Harder than the exam asks. All four pairs share the obvious relationship — the same gap, or every second number odd — and a quieter rule decides, such as a square plus one, a cube minus the number, or both numbers divisible by the same factor. Operations are performed on the whole number, not on its digits.
Every classification question gives four items where three share one property and one does not. Find what the three have in common first, in one short sentence, and only then pick the item that breaks it — looking for “the strange one” without a rule is how the trap options win.
Marks are lost in three places. The first is stopping at the first rule that works — four items can often be split two ways, and only a rule that leaves exactly one out is right. The second is picking the least familiar item instead of the one that breaks the rule. The third is missing the quieter property — at Level 2 all four share the obvious feature and a second one decides.
How Many Number-Pair & Triad Classification Questions Are Asked in SSC CGL?
Classification (odd one out) is one of the steadiest chapters in SSC CGL reasoning — usually two to three questions in every Tier I shift and a few more in Tier II Paper I. More than 300 verbal classification questions have appeared in SSC papers from 2010 to 2024, and they split into the five chapters below.
| Classification chapter | Share of past SSC classification questions |
|---|---|
| Word Classification (single words) | 31% |
| Letter Classification (letters & clusters) | 30% |
| Number Classification (single numbers) | 12% |
| Number-Pair & Triad Classification | 20% |
| Word-Pair & Mixed Classification | 6% |
Shares are from SSC CGL, CHSL, MTS, Steno and CPO papers, 2010–2024 (figure-based questions are counted under Figure Classification). Word-pair questions are a small share of the older papers but the format SSC now uses most in Tier II; practise all five chapters so no format surprises you.
What You Will Practice in the Number-Pair & Triad Classification Chapter
Pairs of numbers
- Fixed difference or fixed sum between the two numbers
- Fixed multiple or ratio — the second is 3 times the first
- Squares and cubes — the second is the square or cube of the first
- Both numbers prime, or both multiples of the same number
Digit-based pairs
- One number is the reverse of the other
- The second is the digit sum or digit product of the first
Triads and two-step rules
- Third number = first × second, first + second or first − second
- Numbers in equal steps, or the middle number halfway between the others
- Two-step rules — square plus one, cube minus the number, double then add
Relationships worth recognising instantly
| Item | What to remember |
|---|---|
| Fixed difference | 14 : 22 — second − first = 8 |
| Fixed sum | 27 : 33 — both add to 60 |
| Multiple | 5 : 20 — second = first × 4 |
| Square | 9 : 81 — second = first × first |
| Cube | 4 : 64 — second = first cubed |
| Reverse | 37 : 73 — digits swapped |
| Triad product | (3, 4, 12) — third = first × second |
| Equal steps | (10, 17, 24) — steps of +7 |
Test one relationship at a time on all four pairs or triads — the odd one is the group that fails the test the other three pass.
The three mistakes that cost the most marks
- Reading the pair as two separate numbers. The rule is in the relationship between them — difference, ratio or operation — not in either number alone.
- Using the same rule on the digits. When a note says operations are on whole numbers, do not add or multiply the digits separately.
- Stopping at the first rule that fits three. A rival rule can fit a different three; check that yours leaves exactly one out.
Solved Examples — SSC CGL Number-Pair & Triad Classification Questions
How the Number-Pair & Triad Classification Chapter Tests Work
- 25 questions per test, with a full question palette — answered, skipped, marked for review, not visited.
- Every question type in every level — the formats of this chapter are spread across the tests so no pattern is missed.
- Optional 15-minute timer — with the clock to build exam speed, without it while you are still learning the chapter.
- Marking: +2 correct, −0.5 wrong, 0 unattempted — the same scheme as the real paper.
- Solutions, shortcut tricks and concept notes open after you submit, question by question — every wrong option is explained too.
- English and हिंदी, chosen at the start of every test.
- Free with a TrickySSC account — sign in once with Google or your mobile number, and every test is open to you.
How to Prepare Number-Pair & Triad Classification for SSC CGL
- Test one relationship at a time. Difference, sum, ratio, square, cube and reverse cover most pairs.
- Write the rule as a sentence. “Second is the square of the first” is a rule; “both are two-digit” is not.
- For triads, test the third number first. It is usually the first two combined by one operation.
- Watch the whole-number note. Operate on the number itself unless the question is clearly digit-based.
- Look for the quieter rule at Level 2. When all four share a gap or a parity, compare the squares, cubes and common factors.
- Do Level 1 untimed first, then with the 15-minute clock. Move to Level 2 once Level 1 is steady, and then check yourself on a previous year paper.
All SSC CGL Chapter Wise Tests
Every chapter below has its own free Level 1 and Level 2 tests with full solutions.
Browse all 45 chapter tests — Maths (35) · Reasoning (10)
- Word Analogy
- Letter Analogy
- Number Analogy
- Number-Set & Triad Analogy
- Mixed Analogy
- Word Classification
- Letter Classification
- Number Classification
- Number-Pair & Triad Classification
- Word-Pair & Mixed Classification
- All Reasoning chapters →
- Number System
- Rule of Divisibility
- Remainder Theorem
- Decimal & Fraction
- LCM & HCF
- Square & Cube Root
- Number Series (AP & GP)
- Power, Indices & Surds
- Algebraic Formula
- Algebraic Result
- Algebraic Expression & Identities
- Percentage
- Profit & Loss
- Discount & Marked Price
- Simple Interest
- Compound Interest
- Ratio & Proportion
- Partnership
- Average
- Problems on Ages
- Mixture & Alligation
- Time & Work
- Pipe and Cistern
- Time, Speed and Distance
- Quadratic Equation
- Boat and Stream
- Races
- Trigonometry
- Heights & Distances
- Geometry
- Mensuration
- Coordinate Geometry
- Probability
- Statistics
- Data Interpretation
- All Maths chapters →
SSC CGL संख्या-युग्म एवं त्रिक वर्गीकरण (Number-Pair & Triad Classification) चैप्टर टेस्ट — हिंदी में
संख्या-युग्म एवं त्रिक वर्गीकरण (NUMBER-PAIR CLASSIFICATION) में चार युग्मों या त्रिकों में से तीन एक ही संबंध का पालन करते हैं — एक-एक संबंध (अंतर, योग, गुणज, वर्ग, घन, उल्टी संख्या) चारों पर जाँचिए और जो नहीं मानता वही उत्तर है।
सबसे आम गलतियाँ: युग्म को दो अलग संख्याएँ मानना (नियम दोनों के बीच के संबंध में है), जहाँ संख्या पर संक्रिया करनी है वहाँ अंकों पर संक्रिया करना, और पहला नियम मिलते ही रुक जाना।
TrickySSC पर इस अध्याय के सभी टेस्ट हिंदी में उपलब्ध हैं — प्रश्न, विकल्प, विस्तृत हल और शॉर्टकट ट्रिक सब हिंदी में। दो स्तर हैं: लेवल 1 (SSC CGL के स्तर का) और लेवल 2 (SSC CGL से कठिन)। प्रत्येक टेस्ट में 25 प्रश्न, वैकल्पिक 15 मिनट का टाइमर और +2 / −0.5 की वही मार्किंग जो असली परीक्षा में होती है।