Defence | BSF Constable (Tradesman)

Mathematics for BSF Constable (Tradesman)

BSF Constable (Tradesman) sets 25 Mathematics questions for 25 marks in the Written Examination, so it is worth planning your preparation around the topics below.

25 questions25 marks5 topics

How to approach Mathematics in BSF Constable (Tradesman)

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 BSF Constable (Tradesman) stage, from the official pattern.

Stage	Questions	Marks	Time	Share
Written Examination	25	25	—	25%

Mathematics syllabus for BSF Constable (Tradesman)

Every topic in the official syllabus. The linked ones open a set of solved questions you can practise straight away.

Number system and basic arithmetic
Percentage, ratio, proportion and averages
Profit and loss, simple and compound interest
Time and work, time, speed and distance
Simple mensuration and basic geometry

Sample Mathematics questions with solutions

Written to the BSF Constable (Tradesman) 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 25% of 480.

120Correct
96
144
160

Solution

25% of 480 = 480 × 25/100 = 480 × 1/4 = 120.

Simple interest · solved example

Find the simple interest on Rs 5,000 at 8% per annum for 3 years.

Rs 1,000
Rs 1,200Correct
Rs 1,400
Rs 800

Solution

SI = P × R × T / 100 = 5000 × 8 × 3 / 100 = 5000 × 24/100 = 1200 rupees.

Time and work · solved example

4 workers complete a job in 12 days. How many days will 6 workers take at the same rate?

8Correct
18
6
9

Solution

Total work = 4 × 12 = 48 worker-days. With 6 workers, time = 48/6 = 8 days.

Mensuration · solved example

Find the area of a rectangle 12 m long and 5 m wide.

60 sq mCorrect
34 sq m
17 sq m
120 sq m

Solution

Area of a rectangle = length × breadth = 12 × 5 = 60 square metres.

Sit Mathematics under a real clock

Mathematics shows up in every BSF Constable (Tradesman) mock test, in the same interface, with sectional locking and negative marking.

BSF Constable (Tradesman): 16-question practice mock
16 questions | 20 min
Start

Frequently asked questions

How many Mathematics questions are asked in BSF Constable (Tradesman)?

BSF Constable (Tradesman) 2024-25 cycle sets 25 Mathematics questions for 25 marks in the Written Examination.

Is there negative marking for Mathematics in BSF Constable (Tradesman)?

No. The BSF Constable (Tradesman) written stage carries no negative marking, so it is worth attempting every Mathematics question you can.

Which Mathematics topics matter most for BSF Constable (Tradesman)?

The BSF Constable (Tradesman) syllabus lists Number system and basic arithmetic, Percentage, ratio, proportion and averages, Profit and loss, simple and compound interest, Time and work, time, speed and distance, Simple 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 BSF Constable (Tradesman) 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 BSF Constable (Tradesman) mock tests to sit it under a real clock with negative marking.