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।
