Select the set of letters that, when placed in the blanks of the given letter series in order, will complete the series.
p _ h k _ p h _ k p _ h k _ p h _ k
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → khpkhp
In a letter series with blanks, look for a block of letters that repeats; the blanks are then the letters the block needs at those places. The 18 places split into two blocks of nine, p _ h k _ p h _ k and p _ h k _ p h _ k. The two blocks show the same letters at the same places, so the 1st and 4th blanks are the same letter, and so are the 2nd and 5th, and the 3rd and 6th.
Only Option (3), k h p k h p, repeats its first three letters as its last three
Block with k, h, p filled in: p k h k h p h p k
Check: the block reads pkh khp hpk, each group of three being the one before it with its first letter moved to the end
The series is pkhkhphpk pkhkhphpk, and the blanks in order are khpkhp.