Criteria Cognitive Aptitude (CCAT) 2025 – 400 Free Practice Questions to Pass the Exam

To identify the next number in the series, let's first analyze the pattern. The series given is: 1, 10, 2, 9, 3.

Observing the pattern, we see that it alternates between two sequences. The first sequence starts at 1 and increases by 1 for each subsequent term: 1, 2, 3. The second sequence starts at 10 and decreases by 1 each time: 10, 9.

Given this structure, we can expect the next number in the first sequence, following 3, which would logically be 4. However, since the next number in the immediate series needs to alternate and continue the second sequence, we look at the second sequence. The next term after 9, following this decreasing pattern, would be 8.

Thus, after 3 in the first sequence, the correct continuation of this alternating sequence yields 8. Therefore, the next number in the series is 8, as it follows the decreasing pattern established in the second half of the sequence. This aligns with the logic observed throughout the series.