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Number Sequence Comparison Flashcards

7 cards from real USPS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Number Sequence Comparison flashcards as text

  1. Compare the two sequences and identify the position of the error: Original: 7421 8836 5509 3174 Copy: 7421 8836 5590 3174

    Answer: Position 3

    Position 3 differs: '5509' was copied as '5590', with the last two digits transposed.

  2. Which pair of number sequences is an EXACT match? A) 28473 91056 / 28473 91056 B) 63819 47203 / 63819 47230 C) 50124 88637 / 50214 88637 D) 71960 32548 / 71960 32584

    Answer: Pair A

    Only Pair A matches exactly; all other pairs contain transposed digits.

  3. Original: 309-555-0172 Copy: 309-555-0127 What type of error occurred?

    Answer: Two digits were transposed

    The last two digits '72' became '27', which is a transposition error.

  4. A postal worker must verify ZIP+4 codes. Which copy matches the original? Original: 90210-4478

    Answer: 90210-4478

    Only '90210-4478' is an exact match; the other options each contain a transposition or substitution.

  5. Original sequence: 14 29 44 59 74 89 Copy: 14 29 44 95 74 89 How many errors are present?

    Answer: 1 error

    There is exactly one error: the fourth element '59' was copied as '95'.

  6. Compare: Original: 8802 1154 6637 9910 Copy: 8820 1154 6637 9910 Which position contains the error?

    Answer: Group 1

    Group 1 differs: '8802' was copied as '8820', swapping the last two digits.

  7. A tracking number must be copied exactly. Identify the correct copy. Original: 9400 1118 9922 3456 7890

    Answer: 9400 1118 9922 3456 7890

    Only the first option is an exact copy; the others each contain one transposed digit.