How many numbers are divisible by their immediately preceding number but not exactly by their immediately following number in the following series?
How many numbers are divisible by their immediately preceding number but not exactly by their immediately following number in the following series?
8 9 9 7 6 0 7 6 5 4 3 2 3 4 3 2 5 6 7 4 3 4 5 6 7 8 3 9 6 5 4 3 2 2 4 5 6 7
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Correct answer: (D) Four
Explanation
Check each term against its neighbours: 9 (after 9, before 7), 9 (after 3, before 6), 2 (after 2, before 4) and 4 (after 2, before 5) are divisible by the preceding number but not by the following one. That gives four numbers.