# Logical Reasoning Questions And Answers :: Letter Series: part1

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Logical Reasoning Ability Test : Letter Series QUESTIONS AND ANSWERS :: part1 : 16 to 20

 16. abxyzbx _zyx__y_____ baxyz abxzy abxyz abzyx opt 5 ANSWER : abxzy Explanation : . Abxyz/bxazy/xabyz/abxzy. The block of first five letters is repeated. In each repetition, 1st letter is taken to 3rd place and positions of 4th and 5th letters are interchanged.
 17. __r_ttp__s_tp___s___ rstqp tsrqp rstpq None opt 5 ANSWER : rstpq Explanation : .pqrst/tpqrs/stpqr/rstpq. The last letter of each previous block is taken in the beginning of the successive block.
 18. a___eab_d_b__b_ bcdba bcdbe bcaba bcabc opt 5 ANSWER : bcaba Explanation : . abcde/abcd/abc/ab/a. In each successive blocks the last letter of previous block is dropped.
 19. ab___bc_e_c__ab__a__ cbade deabc edacb edcba opt 5 ANSWER : deabc Explanation : . abcde/bcdea/cdeab/deabc. In each block 1st letter of previous block is taken to the end of successive block.
 20. ab__tta_xy___b_______ xyabt xybat xytab xtaby opt 5 ANSWER : xytab Explanation : . abxyt/tabxy/ytabx/xytab. The last letter of each previous block of five letters is brought in the beginning of the successive block.

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