USPS Number Sequence Comparison 3

Question 1

Original: 55301 44892 73016
Copy:     55301 44892 73061
The error involves which kind of change?

Accepted Answer

Two adjacent digits were swapped

Answer

In the last group, '16' was transposed to '61', swapping two adjacent digits.

Question 2

How many of these four copies contain an error compared to the original '482-31-9057'?
1) 482-31-9057
2) 482-13-9057
3) 482-31-9057
4) 482-31-9507

Accepted Answer

2 copies have errors

Answer

Copies 2 and 4 contain errors ('31' transposed to '13' and '57' transposed to '07' respectively); copies 1 and 3 are correct.

Question 3

Original: 0039 2281 7754
Copy:     0039 2281 7745
At what position within the last group does the error occur?

Accepted Answer

Digits 3–4

Answer

The last two digits of group 3, '54', were transposed to '45'.

Question 4

A clerk records parcel weights as number strings. Select the entry that was recorded WITHOUT error.
Original source list: 1034 2987 4561 8820

Accepted Answer

1034 2987 4561 8820

Answer

The first entry matches the source list exactly; all others have one transposition.

Question 5

Original: 6 12 18 24 30 36
Copy:     6 12 18 42 30 36
What is the most likely type of keying error in this sequence?

Accepted Answer

Transposition of digits within a number

Answer

'24' was keyed as '42', swapping the two digits — a classic transposition error.

USPS Error Detection Test Practice Test