Direction for Question 18: Study the following arrangement carefully and answer the questions given below: 4 2 6 1 3 8 9 5 8 1 6 5 1 5 8 5 3 9 4 9 2 3 2 1 5 7 2 6 2 4 2 7 4 If all the even digits are deleted from the above arrangement, which of the following will be seventh from the right end of the arrangement?
A3
B1
C5
D9
Answer & Solution
Correct answer: D. 9
Delete all even digits and keep only the odd digits.
From the given arrangement, the remaining sequence is:
$$1,3,9,5,1,5,1,5,5,3,9,9,3,1,5,7,7$$
Now count from the right end:
$$7,7,5,1,3,9,9$$
So the seventh digit from the right end is $9$.
On checking the options, this matches option $D$.