Number series · solved example
Find the next term: 5, 11, 23, 47, ?
- 94
- 96
- 95Correct
- 93
Solution
Each term is double the previous plus one: 5×2+1 = 11, 11×2+1 = 23, 23×2+1 = 47, and 47×2+1 = 95.
SSC | SSC GD Constable
Mathematics for SSC GD Constable
SSC GD Constable sets 20 Mathematics questions for 40 marks in the Computer Based Examination, so it is worth planning your preparation around the topics below.
20 questions40 marks6 topics
How to approach Mathematics in SSC GD Constable
The quantitative core of the railway papers: arithmetic, mensuration, and time-speed-distance built on a secondary-school foundation. Fluency with fractions, percentages and ratios underlies almost every question, so that is where practice pays back fastest.
Weightage in the paper
How much Mathematics is worth in each SSC GD Constable stage, from the official pattern.
| Stage | Questions | Marks | Time | Share |
|---|---|---|---|---|
| Computer Based Examination | 20 | 40 | — | 25% |
Mathematics syllabus for SSC GD Constable
Every topic in the official syllabus. The linked ones open a set of solved questions you can practise straight away.
- Number systems and computation of whole numbers
- Percentage, ratio and proportion, and averages
- Profit and loss, discount and interest
- Time and work, and time, speed and distance
- Fundamental arithmetical operations
- Mensuration and basic geometry
Sample Mathematics questions with solutions
Written to the SSC GD Constable pattern, with the answer key and the method behind it — a look at how the section is actually set before you drill the full topic sets.
Percentage · solved example
Find 20% of 640.
- 133
- 148
- 108
- 123
- 128Correct
Solution
20% means 20/100, so 20% of 640 = 128.
Simple interest · solved example
A sum of Rupees 8,000 amounts to Rupees 9,440 in 2 years under simple interest. What is the rate of interest per annum?
- 8%
- 9%Correct
- 10%
- 12%
Solution
The interest earned is 9440 - 8000 = 1440 rupees over 2 years. Using rate = interest x 100 / (principal x time), we get 1440 x 100 / (8000 x 2) = 144000/16000 = 9%. A quick check: 9% of 8000 is 720 a year, and 720 x 2 = 1440, which matches.
Time and work · solved example
6 workers finish a task in 10 days. How many days will 5 workers take at the same rate?
- 12Correct
- 17
- 7
- 5
- 19
Solution
The work is 10×6 = 60 worker-days, so 5 workers take 60/5 = 12 days.
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Mathematics study material
Sit Mathematics under a real clock
Mathematics shows up in every SSC GD Constable mock test, in the same interface, with sectional locking and negative marking.
Frequently asked questions
How many Mathematics questions are asked in SSC GD Constable?
SSC GD Constable 2026 cycle sets 20 Mathematics questions for 40 marks in the Computer Based Examination.
Is there negative marking for Mathematics in SSC GD Constable?
Yes. SSC GD Constable deducts one fourth of a mark for each wrong answer, Mathematics included, so unsure guesses cost you. 0.25 marks are deducted for each wrong answer (each question carries 2 marks). Unanswered questions carry no penalty.
Which Mathematics topics matter most for SSC GD Constable?
The SSC GD Constable syllabus lists Number systems and computation of whole numbers, Percentage, ratio and proportion, and averages, Profit and loss, discount and interest, Time and work, and time, speed and distance, Fundamental arithmetical operations, Mensuration and basic geometry. Weight your revision towards the ones you are weakest on and confirm the emphasis against the paper analysis for recent cycles.
How can I practise Mathematics for SSC GD Constable free?
Every Mathematics question on this site is free and written to the exam pattern. Use the topic drills for instant-feedback practice, the daily quiz to keep the section warm, and the SSC GD Constable mock tests to sit it under a real clock with negative marking.