USPS Number Sequence Comparison 5

Question 1

A mail handler must verify a 12-digit package ID. Find the error:
Original: 420 921 048 375
Copy:     420 921 084 375

Accepted Answer

Segment 3 (048)

Answer

Segment 3 changed from '048' to '084', swapping the second and third digits.

Question 2

Original: 8001 1008 2002 3003
Copy:     8001 1008 2002 3003
A new clerk flags this as having an error because the numbers look symmetric. The clerk is:

Accepted Answer

Incorrect — the sequences are identical

Answer

The sequences are identical; symmetric-looking numbers are a common distractor on detection tests.

Question 3

Original route code: 7-3-19-42-88-101
Copy:             7-3-19-42-88-110
What changed?

Accepted Answer

The 6th element had its digits transposed

Answer

The last element '101' became '110', with the last two digits transposed.

Question 4

Which of the following number pairs contains a transposition error (not a substitution)?
A) 5839 / 5930
B) 7264 / 7246
C) 4417 / 4471
D) 3058 / 3508

Accepted Answer

Pairs B, C, and D

Answer

Pairs B ('64'→'46'), C ('17'→'71'), and D ('05'→'50') each swap two digits; Pair A replaces '83' with '93', which is a substitution.

Question 5

Original: 10203 40506 70809
Copy:     10203 40560 70809
The error is in which group, and which digits were swapped?

Accepted Answer

Group 2 — digits 4 and 5

Answer

In Group 2, the 4th and 5th digits changed from '06' to '60', a transposition of those positions.

USPS Error Detection Test Practice Test

USPS Error Detection Test Practice Test

USPS Number Sequence Comparison 5