Find the missing group of letters in the following series: IG, NK, DO, (…), AW
IS
IS is correct.
Write each letter as its position in the alphabet. Second letters: G(7), K(11), O(15), ?, W(23) increase by 4 each time, so the missing second letter is \(15+4=19\), which is S.
First letters: I(9), N(14), D(4), ?, A(1). The terms pair up: in the first pair the first letter moves forward by 5 (I → N), and the second pair repeats this step from D, so the missing first letter is \(4+5=9\), which is I.
The alternate first letters I, D, A stand at positions \(9, 4, 1\), that is \(3^2, 2^2, 1^2\), which fixes D and A in their places.
The missing group is therefore IS; a group starting with L or K does not follow the +5 step from D, and P does not continue the +4 chain of second letters.
Similar Questions
Complete the series:
BCA, EFD, HIG, (…)
Important Questions from Alphabet Series
A series is given with some letters missing. Choose the correct alternative from the given ones that will complete the series:
BR __ __ NB __ O __ NBA series is given with some letters missing. Choose the set of letters which when sequentially placed shall complete it .
a __ __ dba __ __ bcad __ __ da __ __ cdIn the following letter series, some of the letters are missing which are given in that order as one of the alternatives below It. Choose the correct alternative
_ a _ b _ abaa _ bab _ abbIn the series _b_a_ba_b_abab_aab;
fill in the six blanks ( _ ) using one of the following given four choices such that the series follows a specific order.
In the series AABABCABCDABCDE..., which letter appears at the 100th place?
