How many 7s immediately preceded by 6 but not immediately followed by 4 are there in following series
7, 4, 2, 7, 6, 4, 3, 6, 7, 5, 3, 5, 7, 8, 4, 3, 7, 6, 7, 2, 4, 0, 6, 7, 4, 3
How many 7s immediately preceded by 6 but not immediately followed by 4 are there in following series
7, 4, 2, 7, 6, 4, 3, 6, 7, 5, 3, 5, 7, 8, 4, 3, 7, 6, 7, 2, 4, 0, 6, 7, 4, 3
Solution
✅ Correct Option: 3
Scan for the pattern 6, 7 and then check the digit after the 7.
The blocks 6, 7, 5 and 6, 7, 2 both qualify, since the 7 follows a 6 and is not followed by 4.
The block 6, 7, 4 near the end fails because the 7 is followed by 4. All other 7s are not preceded by 6.
Hence the count is two.
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