Q32
ReasoningAlphabet, Letter Series & Word Formation
Complete the letter series: st _ s _ trss _ rsst _ s
- a.trsr
- b.rssr
- c.rstr
- d.rtsr
Answer: (C) rstr
The series is the block "strs" repeated four times: strs / strs / strs / strs. Writing out the 16 letters, the given ones are s, t, _, s, _, t, r, s, s, _, r, s, s, t, _, s, so the four blanks must be r, s, t and r in that order, i.e. "rstr". Check: st(r)s (s)trs s(t)rs st(r)s. For such questions, count the total number of letters (given letters plus blanks) and look for a repeating block whose length divides that total, here 16 = 4 × 4.