Verbal Reasoning

Data Sufficiency

Determine if data is sufficient

Data Sufficiency questions test whether you can determine if the given information is enough to answer a question — without actually solving it.

What is Data Sufficiency?

You're given a question and two (or three) statements with data. You must determine if Statement 1 alone, Statement 2 alone, both together, or neither is sufficient to answer the question.

Why is it Important?

Data Sufficiency appears in CAT, GMAT, and advanced banking exams. It tests meta-cognitive skills — understanding what you need vs what you have.

Key Techniques

Don't solve — just determine if solving is possible
Test each statement independently first
If neither alone works, test them together
Unique answer = sufficient; multiple possibilities = insufficient

Common Patterns

•Statement 1 alone sufficient

•Statement 2 alone sufficient

•Both needed together

•Each alone sufficient

•Neither sufficient even together

💡 Pro Tips

1.Focus on sufficiency, not the actual answer

2.For equations: n unknowns need n independent equations

3.Geometric constraints can sometimes make one statement sufficient

📋 Exams Where Asked

CATGMATXATSNAPIBPS POSBI PO

Frequently Asked Questions

What is the standard answer format for Data Sufficiency?

Usually: A) Statement 1 alone sufficient, B) Statement 2 alone sufficient, C) Both together needed, D) Each alone sufficient, E) Neither sufficient.

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