How have CAT papers been when IIM Ahmedabad has set them? Can I expect a change in the pattern?

IIM Ahmedabad has set the CAT papers 2 times till now, 2009 and 2015. So I will show you the pattern of the paper both the years.

CAT 2009

Time: 150 mins

Number of Questions: 60

Sections:3(VARC,DILR and QA)

VARC Section(20 questions): Moderate-Difficult

The section included RCs and VA(all the basic topics that students practice while preparing).

DILR Section(20 questions): Moderate

DI(10 questions): DI sets were lengthy and involved tedious calculations. More speed was required and speed maths was a challenging part.

LR(10 questions): Pure logical, had little or no calculations.

QA Sections(20 questions): Easy-Moderate

This section tested all basic concepts and formulas. Solving previous years papers will help you in this section.

If the exam is of 2 hours this pattern might be repeated 

CAT 2015

Time: 180 mins

Number of questions: 100

Sections: 3 (VARC,DILR and QA) 

VARC (34 questions): 20 questions were easy

Data Interpretation & Logical Reasoning (DILR:32 questions): 17–18 correct was good attempt) This section was the most challenging part of CAT 2015

Quantitative Ability(34 QUESTIONS)

The relative easiness of the Quant section was overshadowed by the tougher section, which preceded QA (ie DILR) and contributed to the fatigue factor. There was huge emphasis on Arithmetics and Geometry and even a non engineer could easily solve it.

If the exam is of 3 hours then this pattern could be repeated.