Table of Contents

• SSC CHSL Maths का महत्व

• Exam Pattern में Maths की भूमिका

• CHSL Maths Syllabus Overview

• Number System Formulas

• Percentage Formulas & Tricks

• Ratio & Proportion Formulas

• Profit–Loss–Discount Formulas

• Simple & Compound Interest Formulas

• Time & Work Formulas

• Time, Speed & Distance Formulas

• Average Formulas

• Algebra Formulas

• Geometry Formulas

• Mensuration Formulas

• Data Interpretation Shortcuts

• Summary Notes

• FAQs

• SEO Meta Data

• Internal Linking Suggestions

• Image Prompt + Alt Text

SSC CHSL में Maths का महत्व

SSC CHSL Tier 1 में Quantitative Aptitude का weightage 25 प्रश्न और 50 अंक का होता है। यह section scoring है क्योंकि:

• formulas fixed हैं

• tricks से questions तेज़ी से solve होते हैं

• SSC का pattern काफी repetitive है

अगर formulas और shortcuts मजबूत हों, तो 25 में से 20+ लाना बिल्कुल आसान है।

SSC CHSL Maths Syllabus Overview

• Number System

• Percentage

• Ratio & Proportion

• Average

• Profit–Loss–Discount

• Simple Interest & Compound Interest

• Time & Work

• Time, Speed & Distance

• Algebra

• Geometry

• Mensuration

• Data Interpretation

Number System Formulas

✔ Even + Even = Even

✔ Odd + Odd = Even
✔ Even × Even = Even
✔ Odd × Odd = Odd

✔ Divisibility Rules

• 2 → Last digit even

• 3 → Sum of digits divisible by 3

• 4 → Last 2 digits divisible by 4

• 5 → Last digit 0 or 5

• 8 → Last 3 digits divisible by 8

✔ Important Trick

A repeating decimal को fraction में बदलने का शॉर्ट ट्रिक:
0.333… = 3/9 = 1/3
0.7272… = 72/99 = 8/11

Percentage Important Formulas

✔ Percentage Formula

Percentage=ValueTotal×100\text{Percentage} = \frac{\text{Value}}{\text{Total}} \times 100Percentage=TotalValue​×100

✔ Increase/Decrease Formula

Increase=ChangeOriginal×100\text{Increase} = \frac{\text{Change}}{\text{Original}} \times 100Increase=OriginalChange​×100

✔ Conversion Trick

• 50% = 1/2

• 25% = 1/4

• 33.33% = 1/3

• 12.5% = 1/8

✔ Trick

किसी संख्या का 20% = उस संख्या का 1/5
40% = 2/5

Ratio & Proportion Formulas

✔ Basic Formula

a:b=aba:b = \frac{a}{b}a:b=ba​

✔ Compound Ratio

a:b और c:d → ac:bd

✔ Trick

अगर ratio 3:4 है और total 84 है
→ हर भाग = 84/7 = 12

Profit–Loss Formulas

✔ Profit/Loss

Profit=SP−CP\text{Profit} = SP - CPProfit=SP−CPLoss=CP−SP\text{Loss} = CP - SPLoss=CP−SP

✔ Profit%

Profit%=ProfitCP×100\text{Profit\%} = \frac{Profit}{CP} \times 100Profit%=CPProfit​×100

✔ Discount Formula

Discount=MP−SP\text{Discount} = MP - SPDiscount=MP−SP

✔ Successive Discount Trick

If two discounts are x% and y%:
Final Discount = x + y – xy/100

Simple Interest Formulas

✔ SI Formula

SI=P×R×T100SI = \frac{P \times R \times T}{100}SI=100P×R×T​

✔ Trick

यदि Rate = Time → SI = Principal × Rate² / 100

Compound Interest Formulas

✔ CI Formula

A=P(1+R100)TA = P\left(1+\frac{R}{100}\right)^TA=P(1+100R​)T

✔ Shortcut Trick

2 साल का CI – SI = P (R/100)²

Time & Work Formulas

✔ Work Formula

Work=Rate×Time\text{Work} = \text{Rate} \times \text{Time}Work=Rate×Time

✔यदि A 10 दिन में काम करता है

तो 1 दिन में काम = 1/10

✔ LCM Method Trick

दोनों के दिनों का LCM लेकर काम का total निकालें।

Time, Speed & Distance Formulas

✔ Main Formula

Distance=Speed×Time\text{Distance} = \text{Speed} \times \text{Time}Distance=Speed×Time

✔ Conversion Trick

• 1 km/hr = 5/18 m/s

• 1 m/s = 18/5 km/hr

✔ Relative Speed

Same direction → (A – B)
Opposite direction → (A + B)

Average Formulas

✔ Average Formula

Average=Sum of itemsNumber of items\text{Average} = \frac{\text{Sum of items}}{\text{Number of items}}Average=Number of itemsSum of items​

✔ Shortcut

अगर किसी item को add या remove करने पर average बदलता है:
Difference × number of items = Change in sum

Algebra Formulas

✔ Identity Formulas

(a+b)2=a2+b2+2ab(a+b)^2 = a^2 + b^2 + 2ab(a+b)2=a2+b2+2ab(a−b)2=a2+b2−2ab(a-b)^2 = a^2 + b^2 - 2ab(a−b)2=a2+b2−2aba2−b2=(a−b)(a+b)a^2-b^2 = (a-b)(a+b)a2−b2=(a−b)(a+b)

✔ Short Trick

(99 × 101) = (100² – 1²)

Geometry Formulas

✔ Triangle

Area = 1/2 × base × height

✔ Rectangle

Area = l × b
Perimeter = 2(l + b)

✔ Circle

Circumference = 2πr
Area = πr²

Mensuration Formulas

✔ Cylinder

Curved Surface Area = 2πrh
Total Surface Area = 2πr(r+h)

✔ Cube

TSA = 6a²

✔ Cuboid

TSA = 2(lb + bh + lh)

Data Interpretation Shortcuts

✔ Percentage Difference Trick

Difference %=Big – SmallSmall×100\text{Difference \%} = \frac{\text{Big – Small}}{\text{Small}} \times 100Difference %=SmallBig – Small​×100

✔ Ratio Comparison

Simply divide values and approximate.

Summary Notes

• Maths SSC CHSL का सबसे scoring section है

• Formula clarity + tricks = High speed

• Daily 25–30 questions practice करें

• PYQs पर ज़्यादा focus करें

• DI, Percentage, Ratio, SI/CI, TSD सबसे important chapters हैं

FAQs

Q1. CHSL Maths में सबसे important formulas कौन से हैं?

Percentage, Ratio, Profit–Loss, SI/CI, Algebra, Geometry।

Q2. क्या Short Tricks से speed बढ़ती है?

हाँ, SSC में shortcuts बहुत helpful होते हैं।

Q3. क्या PYQs repeat होते हैं?

हाँ, pattern काफी similar रहता है।