Question : Directions: How many 8's followed by an even number and preceded by an odd number?
7, 8, 5, 6, 7, 8, 4, 3, 2, 1, 3, 8, 6, 4, 3, 7, 8, 4, 2, 1, 3, 8, 2, 8, 9
Option 1: 4
Option 2: 3
Option 3: 2
Option 4: 5
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Correct Answer: 4
Solution :
Given
:
7, 8, 5, 6, 7, 8, 4, 3, 2, 1, 3, 8, 6, 4, 3, 7, 8, 4, 2, 1, 3, 8, 2, 8, 9
On checking the number of 8's followed by an even number and preceded by an odd number –
7, 8, 5, 6,
7, 8, 4
, 3, 2, 1,
3, 8, 6
, 4, 3,
7, 8, 4,
2, 1,
3, 8, 2
, 8, 9
So, there are four 8's that follow the pattern. Hence, the first option is correct.
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