Staff Selection Commission (SSC CGL)

SPOORTHY

Quantitative Aptitude

Some of the important Percentage ratios, which are

very useful in solving the problems.

25% of n =25 1

100 4n n , 25% of 360

1360=90

4

Important percentage ratios, 16.66% = 1/6, 14.28% = 1/7,

12.5% = 1/8, 11.11% = 1/9, 9.09% = 1/11, 8.33% = 1/12,

6.66% = 1/15, 6.25% = 1/16, 80% = 4/5, 120% = 6/5,

125% = 5/4etc

A merchant allows a discount of 16.66% on the marked

price (MP) of an article and gains 25%. If the article cost

(CP) the merchant at rs.400, find the ratio of listed price

and selling price? (A) 5: 6 (B) 6: 5 (C) 5: 4 (D) 3: 2

Solution: SP = MP Discount = MP 16.66%MP = 1-(1/6) = 5/6MP, SP = (5/6) MP, MP: SP = 6: 5

Geometry

In the figure below, AG = GE, GF//ED, EF//BD and

ED//BC, find the ratio of the area of triangle EFG to

triangle BCD?

Solution: In the figure, GF//ED so GF will divide AE

and AD in the same ratio. G, E, F and D are the midpoints

of AE, AB, AD and AC respectively. GF, EF, ED and BD

are medians in the triangles AFE, AED, ADB

and ABC. Medians divide triangle into two equal

parts, i.e. area of two parts is same. Assume area of

AGF is x, so that area of GFE also equal to x, area of

AFE becomes x + x = 2x. Shown in the figure,

Ratio of Area of EFG/ Area of BCD = x/8x = 1/8.

Similarly Area of AGF/ Area of EDCB = x/12x = 1/12

Trigonometry

Dont get tensed by looking at complex trigonometric

equations, just substitute angles 090 , 00 etc.

3 3

3 2cosA 1 2sin A?

1 2sinA 3 2cos A

(A) 0 (B) 3 (C) 1 (D) 2

Solution: Put A = 090 , 0cos 90 0 and 0sin 90 1 , 3 3

3 1 2

1 2 3

3 3

3 3

0

If2m(m+1)

tan =2m+1

, then cos =?

2

2m(A)

2m +2m+2

2

(2m+1)(B)

2m +2m+1 (C) m + 1 (D) m

Solution: Substitute, m =1, 4

tan =3

, then 3

cos =5

(Basic Pythagorean triplets 3, 4, 5 (52 = 4

2 + 3

2)) so option

B is satisfied for m = 1 which is equal to 3/5. Other Pythagorean triplets: 5, 12, 13; 7, 24, 25; 8, 15,

17; 9, 40, 41; 11, 60, 61; 12, 35, 37; 20, 21, 29.

Root Words (General English)

Gyny = woman, phil = love, mis = hate, anthrope =

mankind

Philogyny = who loves woman, misogyny= who

hates woman, gynecologist =who treats woman.

Philanthropist= who love mankind,

misanthropist= who hates mankind, anthropology=study

of mankind.

Thee = God

Theist = who believes god, Atheist =who doesnt believe god, Theomania = thinking oneself as

god, thearchy= GOVT by Gods, pantheist =who

believes everything is god & god is everything.

Omni = all/every

Omnipresent = everywhere present (God),

Omnipotent = all powerful (God), omniscient =

all knowledge, omni car = for everyone.

We offer coaching for all Staff Selection

Commission exams (CGL, CHSL, SI,

FCIetc.) and also for all other central govt.

exams like C-SAT, FCI, IBACIO, AC,

CDSetc.

SSC CGL 2015 Tier I

Test Series Schedule @ SPOORTHY

Address: flat no 209, 2nd

floor, Moghal Marg apartments, Opp: Deepak theatre, Narayanaguda, Hyderabad

Test Number Date of exam Test Number Date of exam GT 01 16

th July GT 09 30

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GT 02 18th July GT 10 2

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SSC CGL (Tier I) Exam Strategy

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In Tier I how you manage time (120 minutes) is important

One of the best strategy for this, General English 20 minutes (25 + marks), General Awareness 10

minutes (20 + marks), General Intelligence 35 min (40 + marks) and Quantitative Aptitude 55 min (35 +

marks). Compare to other exams, here Reasoning and English sections will be easy, try to get maximum

marks in any two sections, complete GS and English parts within 30 minutes or else that will kill your time

for Quant and Reasoning parts, it is the main reason many are struck in Tier I itself. Write as many test

papers as you can. Read only from few standard books, do not completely believe in any institutes materials

Advantage of Solving

Practice/Previous Papers

Improves speed and Accuracy

Will be knowing how to avoid

negative marking