CSAT

PASSAGE SOLVING


 

QUANTITATIVE  APTITUDE

Numbers

A number is divisible by 2, if its unit’s place digit is 0, 2, 4, or 82.
A number is divisible by 3, if the sum of its digits is divisible by 33.
A number is divisible by 4, if the number formed by its last two digits is divisible by 44.
A number is divisible by 8, if the number formed by its last three digits is divisible by 85.
A number is divisible by 9, if the sum of its digits is divisible by 96.
A number is divisible by 11, if, starting from the RHS,(Sum of its digits at the odd place) – (Sum of its digits at even place) is equal to 0 or 11x7.
Results on Division:Dividend = Quotient × Divisor + Remainder
An Arithmetic Progression (A. P.) with first term ‘a’ and Common Difference ‘d’ is givenby:[a], [(a + d)], [(a + 2d)], … … …, [a + (n – 1)d] nth term, Tn = a + (n 1)d Sum of first ‘n’ terms, Sn= n/2 (First Term + Last Term)16.
A Geometric Progression (G. P.) with first term ‘a’ and Common Ratio ‘r’ is given by:a, ar, ar 

 

Ages

Simplification

BODMAS Rule

1] Bracket  2] Order  3] Division  4] Multiplication  5] Addition  6] Subtraction

Allegations & Mixture.

 

 

Logarithms

Surds and Indices

Pipes and Cistern

X = Pipe fill the tank      (X1, X2, X3 ….etc.)

Y = Pipe empty the tank     (Y1, Y2, Y3 ….etc.)

Time required to fill tank in 1 hr. is = 1/x1 + 1/x2

 

Chain Rule

Boats and Streams

Simple and Compound Interests

Time and Work

Partnership

Trains

Volume and Surface Area

Stocks and Shares

True Discount and Banker’s Discount

Games of Skill

Races

Permutations and Combination

Series

Odd Man Out

Clocks

Heights and Distances

Calendar

Tabulation

Graphs, Bar, Pie and Line Graphs.

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