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RAS — Number/Letter Series MCQs

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

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

RAS — Mental Ability — Number/Letter Series

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

Which specific combinations of alternate operations are classified strictly based on the magnitude of change (rapid vs. small) in the sequence?

Question 2 of 20

Match List-I (Visual Change in Series) with List-II (Underlying Mathematical Operation) and select the correct answer: List-I a. Rapid Increase b. Normal Increase c. Small alternate fluctuations List-II 1. Addition 2. Alternate Addition & Subtraction 3. Multiplication or Positive Power

Question 3 of 20

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

Question 4 of 20

Match List-I (Change Dynamic) with List-II (Core Operation) based on number puzzle rules: List-I a. Rapid Value Decay b. Simple Value Growth c. Alternate minor fluctuations List-II 1. Addition/Subtraction alternately 2. Division 3. Addition

Question 5 of 20

What is the very first step required to find a missing term in a number puzzle or diagram?

Question 6 of 20

In a puzzle where numbers are arranged in a specific pattern, after the underlying mathematical rule is successfully identified, what is the immediate logical next step?

Question 7 of 20

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

Question 8 of 20

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

Question 9 of 20

If a mathematical puzzle involves numbers placed within a specific layout, what is the mandatory prerequisite to finding the missing number?

Question 10 of 20

When a series shows a rapid increase followed by a rapid decrease in an alternating manner, which mathematical operations are being performed one by one?

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

Assertion (A): In the series 2, 3, 5, 7, 11, the next term must be 13. Reason (R): The series consists of prime numbers starting from 2.

Question 13 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 14 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 15 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 16 of 20

What kind of operation is most probably governing a series if the numbers decrease at an unusually fast rate, but do not land on exact quotients?

Question 17 of 20

Match List-I (Sequence Type) with List-II (Underlying Logic) and choose the correct code: List-I a. 1, 4, 9, 16 b. 2, 3, 5, 7 c. 10, 8, 6, 4 List-II 1. Normal Decrease (Subtraction) 2. Squares of Natural Numbers 3. Prime Numbers

Question 18 of 20

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

Question 19 of 20

Consider the following statements regarding the behavior of number series: I. If the numbers grow rapidly, the rule must strictly be a pure multiplication without any other accompanying operation. II. If the numbers grow rapidly, the rule involves multiplication (or positive power), which might also be accompanied by addition or subtraction. Which of the statements is/are correct?

Question 20 of 20

When numbers in a series decrease very rapidly, the primary operation is division. What secondary operations can occur alongside it?

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