Civil Service Clerical Ability Practice Exam 2025 - Free Clerical Ability Practice Questions and Study Guide

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How many times does 6 come immediately before 5 when 5 comes immediately before an odd number? 213656570652658965326932165976

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To determine how many times the digit 6 comes immediately before the digit 5 when 5 comes immediately before an odd number in the sequence 213656570652658965326932165976, we need to analyze the groupings of numbers.

First, let's identify the occurrences of the digit 5 and check if they are followed by odd numbers. The odd numbers in the context of single digits are 1, 3, 5, 7, and 9.

Now, we can examine the sequence:

- The first occurrence of 5 is at the 6th position:

- The following number is 7 (an odd number), and it is preceded by 6. This counts as one valid case: **6** (before) **5** (followed by an odd number).

- The second occurrence of 5 is at the 12th position:

- The following number is 6 (which is even), so this does not count.

- The third occurrence of 5 is at the 15th position:

- The following number is 8 (even), which also does not count.

- The fourth occurrence of 5 is at the 19th position:

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