Credit card numbers are 16 digits long in total. The first digit indicates whether the card is a Visa (4) or a Mastercard (5). The next digit is random. The next two digits after that indicate the "Issuing Bank" as indicated on the Card Provider worksheet.

How many suspects had the Issuing Bank "TSB"

Question

Credit card numbers are 16 digits long in total. The first digit indicates whether the card is a Visa (4) or a Mastercard (5). The next digit is random. The next two digits after that indicate the "Issuing Bank" as indicated on the Card Provider worksheet.

How many suspects had the Issuing Bank "TSB"

BlackTom AI · Accepted Answer

The question concerns counting how many suspects have an Issuing Bank coded as 'TSB' based on credit card numbers.
First, restating the setup: every credit card number here is 16 digits long. Digit 1 identifies the card type (4 for Visa, 5 for Mastercard). Digit 2 is described as a random digit. Digits 3 and 4 (the next two digits after the first two) indicate the Issuing Bank, per the Card Provider worksheet. The task asks how many suspects have the Issuing Bank labeled 'TSB', i.e., how many card numbers show the two-digit bank code corresponding to TSB.
To proceed, you would perform these steps:
1) Obtain the two-digit Issuing Bank code that maps to 'TSB' from the Card Provider worksheet. This gives you a concrete numeric pair, e.g., 12, 34, etc. Without this mapping, you cannot identify which cards count.
2) For each suspect's card number, extract digits 3 and 4 (the third and fourth digits in the 16-digit sequence). These two digits determine the Issuing Bank for that card.
3) Compare the extracted two-digit code to the TSB code obtained in step 1. If they match, that card (and thus that suspect) counts toward the total.
4) Tally all suspects whose cards have the TSB two-digit code in positions 3–4.
Now, addressing the information provided in the prompt: there is no answer given, and there are no answer options. Additionally, the Card Provider worksheet mapping (which two digits correspond to TSB) is not included. Because the required mapping is missing, you cannot compute a numeric count from the data as presented.
If you had the mapping and a list of suspects with their 16-digit numbers, you would perform the extraction (digits 3–4) for each number and count matches to the TSB code. Without the mapping and the actual card numbers, any numerical answer would be speculative.
In summary, to determine the count for 'TSB', you must (a) retrieve the two-digit code for TSB from the Card Provider worksheet, and (b) count how many suspects have that exact code in digits 3 and 4 of their 16-digit card numbers. The current prompt lacks both the mapping for TSB and the suspects' card data, so a concrete numeric result cannot be produced from the given information.

BUSI_V 335 972 2025SS BUSI 335 Midterm 2 2025 S2

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