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IBPS RRB Number Series — practice questions — page 3

Explore 87 free Number Series questions in IBPS RRB Reasoning. Open each question or exercise to read its content, reference answers and available explanation.

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Number Series questions and exercises with answers

Showing questions 61–87 of 87.

Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Flip and pair: letter with statementRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Deduction against inductionRead the answer and worked solution →Tap every statement that follows from 'All cats are animals'Read the answer and worked solution →Complete the conversion ruleRead the answer and worked solution →Which reversal is safe?Read the answer and worked solution →Complete the definition of a sequenceRead the answer and worked solution →Sequence or series?Read the answer and worked solution →True or false: sequences and seriesRead the answer and worked solution →Complete the geometric progression ruleRead the answer and worked solution →Spotting the ruleRead the answer and worked solution →Constant difference, or constant ratio?Read the answer and worked solution →Order the steps: crack a number seriesRead the answer and worked solution →True or false: geometric progressionsRead the answer and worked solution →Finding a termRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Tap every sequence with a constant ratioRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Finite or infinite?Read the answer and worked solution →Complete the geometric meanRead the answer and worked solution →True or false: reading a series questionRead the answer and worked solution →

Worked practice questions

Assertion and reason

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Questions
  1. Reason
    The conversion would distribute a term that the original left undistributed.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    'Some men are not cooks' does not give 'Some cooks are not men'.
  2. Reason
    A universal negative distributes both of its terms.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    'No S is P' may be reversed freely.
  3. Reason
    Induction generalises beyond the cases actually observed.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    An inductive conclusion can be false though the evidence is true.
  4. Reason
    A universal affirmative distributes its subject.
    Verdict
    The assertion is false and the reason is true.
    Assertion
    'All S is P' may be reversed to 'All P is S'.
The reason must genuinely explain the assertion. Source: Logic: Deductive and Inductive, Carveth Read (1898), public domain.

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Two are true, one is not

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Questions
  1. False statement
    'Some S is not P' reverses safely
    Statements
    1. 'No S is P' reverses safely
    2. 'Some S is P' reverses safely
    3. 'Some S is not P' reverses safely
  2. False statement
    O is the universal negative
    Statements
    1. O is the universal negative
    2. A is the universal affirmative
    3. O is the particular negative
  3. False statement
    Induction guarantees a true conclusion
    Statements
    1. Deduction draws out what premises contain
    2. Induction guarantees a true conclusion
    3. Induction generalises beyond the evidence
The false line always over-reverses a statement. Source: Logic: Deductive and Inductive, Carveth Read (1898), public domain.

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Three of these are wrong. Find the one that holds.

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Questions
  1. Question
    Three of these conversions are invalid.
    Choices
    1. Item
      No S is P gives No P is S
      Correct
      Yes
    2. Explanation
      P was undistributed, so it cannot be distributed now.
      Item
      All S is P gives All P is S
    3. Explanation
      O cannot be truly converted.
      Item
      Some S is not P gives Some P is not S
    4. Explanation
      That flips the quality from affirmative to negative.
      Item
      All S is P gives No P is S
  2. Question
    Three of these statements about the four forms are false.
    Choices
    1. Item
      I is the particular affirmative
      Correct
      Yes
    2. Explanation
      A is UNIVERSAL affirmative.
      Item
      A is the particular affirmative
    3. Explanation
      E is UNIVERSAL negative.
      Item
      E is the particular negative
    4. Explanation
      O is PARTICULAR negative.
      Item
      O is the universal negative
Each trap reverses a statement that cannot be reversed. Source: Logic: Deductive and Inductive, Carveth Read (1898), public domain.

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