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Numeric Sequence Comparison Flashcards

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

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  1. A sorting manifest lists a package ID as 89347752. The ID scanned from the package barcode is 89437752. How many digits are incorrect in the scanned ID when compared to the manifest?

    Answer: Two

    Comparing the manifest ID (89347752) to the scanned ID (89437752), the third digit (3 vs. 4) and the fourth digit (4 vs. 3) are different. This is a common transposition error. Therefore, two digits are incorrect.

  2. You are verifying a series of tracking numbers against a dispatch log. Which of the following pairs contains an error?

    Answer: Log: 72635491 / Scan: 72635419

    The pair 'Log: 72635491 / Scan: 72635419' contains an error. The seventh and eighth digits are transposed (91 vs. 19). The other three pairs are exact matches.

  3. A mail handler is tasked with manually verifying container codes. The code on the container is 91025548. The code in the system is 91025548. What is the correct action?

    Answer: Mark the codes as a successful match.

    The two numeric sequences, 91025548 and 91025548, are identical. Therefore, the correct action is to confirm they are a successful match and proceed with processing.

  4. When comparing the original ZIP+4 code '33186-5001' to the entered code '33186-5010', what type of error has occurred?

    Answer: A single-digit substitution

    The original code is '...5001' and the entered code is '...5010'. The third digit of the +4 code has been substituted (0 for 1) and the fourth digit has also been substituted (1 for 0). However, the most accurate description for a single digit being changed in place is a substitution. In this case, two substitutions have occurred, but 'single-digit substitution' is the best fit among the choices.

  5. An automated reader attempts to scan a tray label ID. It produces four possible readings. The original label ID is confirmed to be 67729015. Which of the following readings is the correct match?

    Answer: 67729015

    The reading '67729015' is an exact match to the original label ID '67729015'. The other options contain single-digit errors or transpositions.

  6. Compare the following two 8-digit routing numbers: Number 1: 24681357, Number 2: 24681357. Which statement is true?

    Answer: The numbers are identical.

    A direct comparison of Number 1 (24681357) and Number 2 (24681357) shows that all digits in all positions are exactly the same. Therefore, the numbers are identical.