defence exam ITBP (Telecommunication) Head Constable Mock Test 2024 Logical Reasoning Arrangement and Pattern Mixed Series
How many such 7s are there in the following number sequence each of which is immediately preceded by 8 or 9 but not immediately followed by 2 or 5?
8 7 6 1 2 7 7 9 7 3 4 1 1 8 7 5 7 9 7 7 4 3 8 7 1 8 7 2
1
three
2
four
3
two
4
five