What is the validity of CAT certificate?

Algebra is an important part of CAT Quant section. OF 7-8 Algebra based questions, 1-2 questions are directly based on Quadratic Equation.

Candidates can expect 1 to 2 questions from Quadratic Equations in the CAT exam. CAT Algebra section has about 7 to 9 questions.

You can refer books such as Logical Reasoning by Arihant, Logical and Analytical Reasoning by Ashok Gupta, A Modern Approach to Logical Reasoning by RS Aggarwal and How To Prepare Logical Reasoning for CAT by Arun Sharma.

Although not many questions are asked from Binary Logic, CAT exam aspirants must not ignore this section during preparation as each mark counts.

There is no specific number of questions asked on Binary Logic in CAT exam. There can be 1-2 standalone questions in Logical Reasoning section of the exam.