Olympiad Test: Alpha-Numeric Sequence Puzzle - 1 - Class 6 MCQ

Here's the sequence broken down with spaces for clarity:

A B D C D C C D C L C D D C I D C C D

Now, let's check each occurrence of C:

1. The first C: preceded by D (D C)
2. The second C: preceded by D (D C)
3. The third C: not preceded by D (C C)
4. The fourth C: preceded by D (D C)
5. The fifth C: not preceded by D (L C)
6. The sixth C: not preceded by D (C D)
7. The seventh C: preceded by D (D C)
8. The eighth C: preceded by D (D C)
9. The ninth C: not preceded by D (C C)
10. The tenth C: not preceded by D (C D)

There are five C's that are immediately preceded by D. Therefore, the correct option is: Five

There are five occurrences of P in the sequence that are in odd places.

The given series is: M, 19, W, 3, 25, A, 35, 20, 22, 21, 45, H, 47, 48, 9

Let's go through each number in the series:

• 19 (not divisible by 3 or 5)
• 3 (divisible by 3, followed by 25, which is not a consonant)
• 25 (divisible by 5, followed by A, which is not a consonant)
• 35 (divisible by 5, followed by 20, which is not a consonant)
• 20 (not divisible by 3 or 5)
• 22 (not divisible by 3 or 5)
• 21 (divisible by 3, followed by 45, which is not a consonant)
• 45 (divisible by 3 and 5, followed by H, which is a consonant)
• 47 (not divisible by 3 or 5)
• 48 (divisible by 3, followed by 9, which is not a consonant)
• 9 (divisible by 3, followed by end of the series)

The only number that meets the criteria is 45, as it is divisible by 3 and 5 and is immediately followed by the consonant H.

Therefore, the correct answer is:

3 One