# Maths Paper 1, November 2024, question 12.3

> A company makes 4-character codes in the form letter | digit | letter | digit. Marked mark by mark. Q12.3, Maths Paper 1 November 2024, 2 marks.

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Last updated: 2026-11-12

Subject: Maths. Source: Based on Nov 2024 · Paper 1 · Q12.3. Marks: 2. Not yet checked by a teacher.

## Question 12.3 (2 marks)

A company makes 4-character codes in the form letter | digit | letter | digit. The first digit is chosen from 1 to 9 and the last digit must be an even digit (0, 2, 4, 6 or 8). Letters may be repeated. At present only 20 of the 26 letters of the alphabet may be used, which gives 18 000 different codes. The company now allows 5 of the 6 letters that were left out to be used as well, so 25 letters are available. Calculate the percentage increase in the number of different codes.

## Practise it

[Answer this question](https://sharpkop.co.za/maths/2024-nov-p1/q12-3/) and see it marked mark by mark, with the reason for every lost mark.

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