Q 29. Series
In the series AABABCABCDABCDE... which letter appears at the 100th place?
- Given Series = A (1 Letter) AB (2 Letters) ABC (3 Letters) ABCD (4 Letters) ABCDE (5 Letters) …… so on up to 100th letter.
- Sum of first 13 natural numbers = 1 + 2 + 3 + 4 + 5 ….. 13 = n(n+1)/2 = 13×14/2 = 91.
- Now last string will only have letters.
- Which would be – ABCDEFGHI.
- Thus I is the correct answer.
Q 65. Series
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.
- Let's start with option (d) and put the given terms in the series.
- a b b a a b, a b b a ab, a b b aab
- From above series, we can clearly say that 6 terms of the series follow same pattern. i.e. abbaab.
- Thus option (d) is the correct answer
Q 15. Series
Consider the following arrangement that has some missing letters: abab_b_bcb_dcdcded_d The missing letters which complete the arrangement are
The given sequence follows following sequence
a b a b a
b c b c b
c d c d c
d e d e d
So, the missing letters are: a, c, c, e
Q 54. Series
Consider the following sequence that follows some arrangement: c_accaa_aa_be_b The letters that appear in the gaps are
• There are 15 characters in the sequence. So we should find sequences of 5 characters each in it.
• By applying the options given, we find that correct sequence is ccacc aabaa bbcbb when we use option (b)