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CET 12th Level — Number/Letter Series MCQs

Practice 20 free number/letter series multiple choice questions for CET 12th Level exam. Instant answers with explanations in Hindi and English.

Master Number/Letter Series under Mental Ability for CET 12th Level with our curated MCQ set. Every question follows real Rajasthan exam patterns. Switch between Hindi and English anytime.

CET 12th Level — Mental Ability — Number/Letter Series

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

In the series 1, 4, 9, 16, ?, 36, what is the missing term and what rule does it follow?

Question 2 of 20

Which of the following mathematical operations is NOT explicitly mentioned as a common base for number series in the standard rules of number puzzles?

Question 3 of 20

Match List-I (Observation in Series) with List-II (Likely Mathematical Operation) and select the correct answer: List-I a. Increase then decrease with small difference b. Rapid increase then rapid decrease c. Normal rate of increase List-II 1. Alternate Multiplication and Division 2. Alternate Addition and Subtraction 3. Addition

Question 4 of 20

Which specific sequence correctly represents the logical rule of 'Squares of natural numbers'?

Question 5 of 20

If a series alternately increases and decreases, but the difference between consecutive terms is small, which operations are alternating?

Question 6 of 20

What mathematical pattern governs a series where values increase and decrease alternately, but the difference between consecutive terms remains relatively small?

Question 7 of 20

Which of the following characteristics differentiates a 'multiplication/division alternate' series from an 'addition/subtraction alternate' series?

Question 8 of 20

Assertion (A): Identifying whether a series alternates between increasing and decreasing can help immediately filter the possible mathematical operations involved. Reason (R): Alternating patterns strictly narrow the possibilities to either alternating add/sub or alternating mult/div, based on the magnitude of change.

Question 9 of 20

Match List-I (Example Series) with List-II (Underlying Logic) and choose the correct code: List-I a. 1, 4, 9, 16, 25, 36 b. 2, 3, 5, 7, 11, 13 List-II 1. Prime numbers starting from 2 2. Squares of natural numbers

Question 10 of 20

Which of the following is NOT a typical sign of a subtraction-based series?

Question 11 of 20

Consider the following statements regarding diagram-based number puzzles: I. Numbers filled in a diagram follow a specific rule. II. The operations required to find the missing term are usually entirely different from standard arithmetic like addition, subtraction, or squares. Which of the statements given above is/are correct?

Question 12 of 20

A student identifies that a series uses multiplication because the numbers grow rapidly. However, the exact multiples don't match. What additional step is advised by the standard puzzle rules?

Question 13 of 20

What can be the constituent elements of a reasoning series puzzle?

Question 14 of 20

If a student observes a number puzzle where values first increase and then decrease by large margins consecutively, what should they investigate first?

Question 15 of 20

According to the principles of number puzzles, what is the best method to gain proficiency in solving these questions?

Question 16 of 20

Assertion (A): A numerical series where numbers decrease rapidly is generally governed primarily by the subtraction operation. Reason (R): Subtraction naturally causes a normal rate of decrease, whereas division is responsible for a rapid rate of decrease.

Question 17 of 20

Consider the following statements regarding number series: I. A normal rate of increase suggests an addition-based series. II. A normal rate of decrease suggests a subtraction-based series. Which of the statements given above is/are correct?

Question 18 of 20

When the values in a number series are decreasing at a normal rate, the underlying operation is generally:

Question 19 of 20

Assertion (A): A series displaying numbers 2, 3, 5, 7, 11 shows an addition of constant values between terms. Reason (R): 3-2=1, 5-3=2, 7-5=2, 11-7=4 does not yield a constant added value, indicating the series rule is prime numbers instead.

Question 20 of 20

Assertion (A): The mathematical operation applied to find a missing term in a number puzzle is always identical across all puzzles of that category. Reason (R): Different puzzles involve different mathematical operations, requiring specific identification for each individual case.

More Mental Ability Subtopics

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