How many 4s are there in the following number sequence which are immediately preceded by 6 and immediately followed by 5?
4 6 5 9 4 6 4 5 1 3 5 4 6 2 3 1 6 4 5 8 9
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Two
Look at every 4 and the digits on both sides of it: only a 4 with 6 just before it and 5 just after it, the group “6 4 5”, is counted.
