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Question

Refer to the following letter series and answer the question. Counting to be done from left to right only.

(Left) H Y B V F B J I N U H O V E X G V C T E R K B M (Right)

How many such consonants are there each of which is immediately preceded by a vowel and also immediately followed by a vowel?

The correct answer is

Three

The vowels are A, E, I, O and U; every other letter, including Y, is a consonant. Number the series from the left: 1 H, 2 Y, 3 B, 4 V, 5 F, 6 B, 7 J, 8 I, 9 N, 10 U, 11 H, 12 O, 13 V, 14 E, 15 X, 16 G, 17 V, 18 C, 19 T, 20 E, 21 R, 22 K, 23 B, 24 M.

The vowels stand at places 8 (I), 10 (U), 12 (O), 14 (E) and 20 (E). A qualifying consonant must sit between two vowels, so look at the letter right after each vowel.

I → N → U: N is a consonant with vowels on both sides, so it qualifies. U → H → O: H qualifies. O → V → E: V qualifies. E → X → G: X is followed by a consonant, so it fails. E → R → K: R is followed by a consonant, so it fails.

Therefore the qualifying consonants are N, H and V, i.e. 3 consonants.

Check: the pattern vowel–consonant–vowel occurs only in the stretch I N U H O V E (places 8 to 14); it contains exactly the three middle consonants N, H and V, so the count is 3.

Hence, Three.

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Important Questions from Alphabet Series

  1. A series is given with some letters missing. Choose the correct alternative from the given ones that will complete the series:

    BR __ __ NB __ O __ NB
  2. A series is given with some letters missing. Choose the set of letters which when sequentially placed shall complete it .

    a __ __ dba __ __ bcad __ __ da __ __ cd
  3. In 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 _ abb
  4. In 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.

  5. In the series AABABCABCDABCDE..., which letter appears at the 100th place?

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