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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. A postal sorter compares two printouts. Find the FIRST group that differs: Original: 2211 3344 5566 7788 Copy: 2211 3344 5656 7788

    Answer: Group 3 (5566)

    Group 3 differs: '5566' was printed as '5656', with the middle two digits transposed.

  2. Original barcode digits: 0 7 1 4 2 8 3 9 5 6 Copy: 0 7 1 4 2 8 3 9 6 5 Which positions are swapped?

    Answer: Positions 9 and 10

    Positions 9 and 10 were swapped: '5 6' became '6 5'.

  3. Original address number: 14832 Which of the following copies contains exactly ONE error?

    Answer: 14382

    '14382' swaps the third and fourth digits ('83' → '38'), introducing exactly one transposition error.

  4. Original: 5050 5500 0055 0505 Copy: 5050 5500 0055 0505 How should a clerk mark this comparison?

    Answer: No error — sequences match exactly

    Both sequences are identical; the repetitive digit patterns can mislead but a careful comparison confirms no error.

  5. Sequence pair: A: 9183 6274 5019 B: 9183 6724 5019 The discrepancy is best described as:

    Answer: A transposition of two adjacent digits in group 2

    In group 2, '6274' became '6724', swapping the second and third digits — a transposition.

  6. A USPS form shows these two ZIP code entries. Which pair is a correct match? A) 85021 / 85021 B) 30318 / 30381 C) 10001 / 10010 D) 60614 / 60641

    Answer: Pair A

    Only Pair A is an exact match; the other pairs each contain transposed digits.

  7. Original: 33 66 99 132 165 198 Copy: 33 66 99 123 165 198 What is the position of the error?

    Answer: 4th element

    The 4th element '132' was copied as '123', transposing the last two digits.