USPS - Error Detection Test Error Detection Numeric Sequence Comparison 1 — Questions and Answers
Question 1: Compare the two numeric sequences and identify if there is an error: Left: 3847291056 Right: 3847291056
- No error detected; the sequences are identical (Correct answer)
- Error detected; the 4th and 5th digits are transposed
- Error detected; the 8th digit differs between sequences
- Error detected; the 2nd digit is incorrect in the right sequence
Correct answer: No error detected; the sequences are identical
Both sequences read 3847291056 from left to right with no differences. Every digit in the same position matches exactly, so no error is present.
Question 2: Compare the two numeric sequences and identify if there is an error: Left: 6150837294 Right: 6150873294
- No error detected; the sequences are identical
- Error detected; the 3rd and 4th digits are transposed
- Error detected; the 6th and 7th digits are transposed (Correct answer)
- Error detected; the 9th digit differs between sequences
Correct answer: Error detected; the 6th and 7th digits are transposed
The left sequence reads ...837... while the right reads ...873... — the digits 3 and 7 in positions 6 and 7 have been swapped, making the two sequences different.
Question 3: Compare the two numeric sequences and identify if there is an error: Left: 312-847-5026 Right: 312-847-5026
- No error detected; the sequences are identical (Correct answer)
- Error detected; the area code differs between sequences
- Error detected; the last four digits are transposed
- Error detected; the middle segment contains an error
Correct answer: No error detected; the sequences are identical
All three segments of both formatted sequences — 312, 847, and 5026 — are identical. The hyphen formatting matches as well, so there is no error.
Question 4: Compare the two numeric sequences and identify if there is an error: Left: 57839102647 Right: 57839112647
- No error detected; the sequences are identical
- Error detected; the 5th digit differs between sequences
- Error detected; the last two digits are transposed
- Error detected; the 7th digit differs between sequences (Correct answer)
Correct answer: Error detected; the 7th digit differs between sequences
The first six digits (578391) match, but position 7 is 0 in the left sequence and 1 in the right sequence. All remaining digits are identical, confirming a single-digit substitution error at position 7.
Question 5: Compare the two numeric sequences and identify if there is an error: Left: 94061827350 Right: 94061827530
- No error detected; the sequences are identical
- Error detected; the 5th and 6th digits are transposed
- Error detected; the 8th digit differs between sequences
- Error detected; the 9th and 10th digits are transposed (Correct answer)
Correct answer: Error detected; the 9th and 10th digits are transposed
The first eight digits (94061827) are identical, but positions 9 and 10 differ: the left sequence has 35 while the right has 53, indicating the digits 3 and 5 were transposed.
Question 6: Compare the two numeric sequences and identify if there is an error: Left: 748-293-6015 Right: 748-293-6015
- Error detected; the prefix segment differs
- Error detected; the 6th digit is incorrect in the right sequence
- Error detected; the last four digits are in the wrong order
- No error detected; the sequences are identical (Correct answer)
Correct answer: No error detected; the sequences are identical
Every digit and hyphen in both sequences matches: 748 equals 748, 293 equals 293, and 6015 equals 6015. The sequences are completely identical with no error present.
USPS - Error Detection Test Error Detection Numeric Sequence Comparison 1
Compare the two numeric sequences and identify if there is an error:
Left: 3847291056
Right: 3847291056