[Studyplan] ACIO: Aptitude, Maths, Reasoning and English Essay for Assistant Central Intelligence Officer (ACIO) exam
 Prologue
 Maths / Quantitative Aptitude
 Probability
 Algebra, Linear Eq.
 Average Allegation
 Time speed distance work
 Percentage, profitloss, SICI
 Number theory, LCMHCF
 AVP (Area Volume Perimeter)
 Reasoning
 #1: Chart based
 #2: coding n series + alphabet
 #3 Analogy, odd man
 Nonpriority
 English
 Appendix: Download
Prologue
In the Assistant Central Intelligence Officer (ACIO) exam, you’ve to face two papers
 Paper I: 100 Multichoice questions from General Awareness + aptitude (=Maths + reasoning)
 Paper II: English Essay worth 50 marks
Total time limit: 1 hr 40 minutes
In this article, we see the approach for Maths, reasoning and English.
The approach for General awareness (History, geography, science, current affairs etc.) is given in a separate article: click me
In ACIO 2012 Question paper, the internal breakup was:
General Awareness  79 
Maths  9 
Reasoning  12 
Total MCQ  100 
Therefore, Maths+ Reasoning=9+12=21= approx. 1/5^{th} of paper was about Aptitude. So cost:benefit is quite good but Practice@home=essential, otherwise following things will happen:
#1: silly mistakes in calculation
wrong  right 
x5=(15/2)2*x5=152x=15+52x=20
x=10 
x5=15/22(x5)=152*x(2*5)=152x10=15
2x=25 x=12.5 
#2: formula problem
you won’t be able to recall formulas or you will plug wrong values in the formula=> either way answer will not come. (Example: area of equilateral triangle asked in ACIO2012)
#3: time problem
 In maths, Because of problem #1 + #2= your answer will not match the given options A/B/C/D then you recalculate the whole sum again=time wasted.
 In reasoning, you’ll take lot of time in each sittingarrangement/bloodrelation / codingdecoding type question. = time wasted
In short, if you want to crack a government / Bank / PSU exam=> aptitude practice@home is essential.
Maths / Quantitative Aptitude
Donot Fear Maths, Donot Hate Maths. If you basic concepts are clear and you practice enough at home, then most of maths/reasoning questions can be solved without effort or mistake during the exam.
Negative thinking “maths is too difficult, ye mujse nahi hoga”=> you’ll only dig your own grave while others prepare maths and get selected for the job.
For all competitive exams of India, we can classify math topics into following
Regular topics  SSC/CDS/CAT exclusive  Misc Topics* 
prepare for ACIO  Ignore for ACIO  prepare for ACIO 

(Usually nonSSC/CDS/CAT exam don’t bother much asking questions from this topics). 
(Most govtjob exams nowadays don’t bother with these topics but they were asked in ACIO2012 hence need to be prepared.) 
Preparation Source:
 NCERT maths (free download @bottom)
 Mrunal.org/aptitude
 Any one Quantitate Aptitude book. Even second hand /used copy will work you don’t need latest edition. Based on their utility for SSCCGL exam, I classify the Quant books into 3 types:
will work in ACIO + Useful for SSCCGL; CDSBecause quadratic eq., trigonometry and geometrytheory (nonAVP) is covered properly. 

will work in ACIO but Not so useful for SSCCGL; CDSBecause quadratic eq., trigonometry and nonAVP geometry is not covered in length. 

Useless for any exam  Readymade Junk from jholachhap publishers like “ACIO guide book; RBI assistant guidebook; National Insurance AO guidebook” etc. 
 For additional practice you may go through previous SSC question papers (but ignore trigonometry, quadratic equation and geometry except Areavolumeperimeter.)
Permutation combination probability (PCP)
In the late90s, this used to be the hotfavorite topic for govt.exams, but nowadays rarely comes. However ACIO2012 did contain two questions from PCP (meaning ACIO papersetter uncleji still runs with 90s mindset) so you’ve to prepare PCP. Most of the PCP stuff can be solved without any formulas. Go through following articles
 [Aptitude] Permutation Combination made easy without Formulas
 [Aptitude] Combination: Coins possible Sums (without formula)
 [Aptitude] PnC: arrange such that two people Always sitting together?
 [Aptitude] PnC: How many Ways to arrange letters of word “RECUPERATE” (Permutation without Formulas)
 [Aptitude] PnC Arrange digits in ascending order to form numbers (asked in UPSC 2009)
 [Aptitude] PnC: Conditional Selection in Committee
 [Aptitude] PnC: Binomial Expansion. How many ways to select one or more out of given Items?
Additionally, I had also uploaded a few shortlectures about PCP on youtube you can see them on: