Find the missing term in the series. B, D, G, K, P, ?
V
These are capital letters, so the cleanest way to see the rule is to replace each one with its numerical position in the English alphabet.
The five given letters become \(B=2,\ D=4,\ G=7,\ K=11,\ P=16\), a rising list of numbers.
Because the numbers are increasing but not by a fixed amount, look at the gap between each pair of consecutive positions.
The successive differences are \(4-2=2\), \(7-4=3\), \(11-7=4\) and \(16-11=5\).
These gaps themselves form the neat pattern \(+2,+3,+4,+5\), each one larger than the last by exactly one, so the next gap has to be \(+6\).
Adding this to the position of the final printed letter gives \(16+6=22\), and the 22nd letter of the alphabet is V.
The concept is a second-order alphabet series: the letters do not step evenly, but the differences between them do. Hence the missing term is V.
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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 .
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_ 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?
