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HAL Apprentice Coding Decoding — practice questions — page 4

Explore 109 free Coding Decoding questions in HAL Apprentice Reasoning. Open each question or exercise to read its content, reference answers and available explanation.

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Coding Decoding questions and exercises with answers

Showing questions 91–109 of 109.

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

Which reversal is safe?

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Items
  1. Item
    No S is P
    Category
    Reverses safely
  2. Item
    Some S is P
    Category
    Reverses safely
  3. Item
    All S is P
    Category
    Does not reverse
  4. Item
    Some S is not P
    Category
    Does not reverse
Categories
  1. Item
    Reverses safely
  2. Item
    Does not reverse
Two of the four forms reverse freely, two do not. Source: Logic: Deductive and Inductive, Carveth Read (1898), public domain.

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Complete the definition of a sequence

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Missing parts
  1. Answer
    definite
    Choices
    1. definite
    2. random
    3. increasing
  2. Answer
    rule
    Choices
    1. rule
    2. guess
    3. accident
  3. Answer
    finite
    Choices
    1. finite
    2. infinite
    3. geometric
Complete the statement
A sequence is an arrangement of numbers in {0} order according to some {1}. One with a finite number of terms is a {2} sequence.
A sequence is an ordered arrangement following a rule, which is exactly what a number-series question hides. Source: syllabus Maths, Ch 9 Sequences and Series.

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Sequence or series?

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Items
  1. Item
    An ordered list of terms
    Category
    Sequence
  2. Item
    a₁, a₂, a₃, ...
    Category
    Sequence
  3. Item
    What a number-series puzzle shows you
    Category
    Sequence
  4. Item
    The sum of the terms
    Category
    Series
  5. Item
    a₁ + a₂ + a₃ + ...
    Category
    Series
  6. Item
    Has a value, not just an order
    Category
    Series
Categories
  1. Item
    Sequence
  2. Item
    Series
A sequence lists terms; a series adds them. Series questions and sequence questions are answered differently. Source: syllabus Maths, Ch 9 Sequences and Series.

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