USPS Number Sequence Comparison 4

Question 1

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

Accepted Answer

Group 3 (5566)

Answer

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

Question 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?

Accepted Answer

Positions 9 and 10

Answer

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

Question 3

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

Accepted Answer

14382

Answer

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

Question 4

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

Accepted Answer

No error — sequences match exactly

Answer

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

Question 5

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

Accepted Answer

A transposition of two adjacent digits in group 2

Answer

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

USPS Error Detection Test Practice Test