Alphanumeric Series questions with solutions

1. Question 1Moderate
   Study the following arrangement and answer the questions based on it: 5 R 2 P K 9 # M 3 A 7 Q $ 1 B W 6 @ E 4 U 8 D T

   How many symbols in the arrangement are each immediately preceded by a number and immediately followed by a letter?

   • A.None
   • B.One
   • C.TwoCorrect
   • D.Three
   • E.More than three
   Show solution

   Check the three symbols. '#' follows 9 (a number) and is followed by M (a letter) - it qualifies. '$' follows Q (a letter), so it fails. '@' follows 6 (a number) and is followed by E (a letter) - it qualifies. Exactly two symbols meet the rule.

2. Question 2Moderate
   Study the following arrangement and answer the questions based on it: 5 R 2 P K 9 # M 3 A 7 Q $ 1 B W 6 @ E 4 U 8 D T

   Which element is fourth to the left of the twentieth element from the left end of the arrangement?

   • A.K
   • B.B
   • C.WCorrect
   • D.6
   • E.$
   Show solution

   The twentieth element from the left is 4. Counting four to its left - E, @, 6, W - the fourth is 'W'.

3. Question 3Moderate
   Study the sequence carefully: P 4 @ K 7 # 2 R % M 5 & 9

   How many symbols in the sequence are immediately preceded by a number?

   • A.One
   • B.Two
   • C.ThreeCorrect
   • D.Four
   • E.None
   Show solution

   The symbols are @, #, % and &. The @ is preceded by 4, the # by 7 and the & by 5, all numbers, while % is preceded by the letter R. So three symbols are immediately preceded by a number.

4. Question 4Moderate
   Study the sequence carefully: P 4 @ K 7 # 2 R % M 5 & 9

   Which element is fourth to the left of the ninth element from the left?

   • A.7Correct
   • B.#
   • C.2
   • D.R
   • E.K
   Show solution

   Counting from the left, the ninth element is %. Four places to its left is the fifth element. Counting P, 4, @, K, 7, the fifth element is 7.

5. Question 5Moderate
   Study the following arrangement and answer the questions based on it: 5 R 2 P K 9 # M 3 A 7 Q $ 1 B W 6 @ E 4 U 8 D T

   Which element is seventh to the right of the fifteenth element from the left end of the arrangement?

   • A.U
   • B.8Correct
   • C.D
   • D.4
   • E.@
   Show solution

   The fifteenth element from the left is B. Counting seven more to the right - W, 6, @, E, 4, U, 8 - the seventh is '8'.

6. Question 6Moderate
   Study the arrangement below and answer the question that follows. Q 3 % K 7 B @ 2 M 9 # R 5 J $ 8 W T 6

   How many symbols are there in the arrangement, each of which is immediately preceded by a letter and immediately followed by a digit?

   • A.None
   • B.One
   • C.TwoCorrect
   • D.Three
   • E.Four
   Show solution

   There are four symbols to test. The percentage sign is preceded by 3, a digit, so it fails at once. The at sign is preceded by B and followed by 2, which qualifies. The hash is preceded by 9, so it fails. The dollar sign is preceded by J and followed by 8, which qualifies. That gives two. Check the preceding element first, since it eliminates half the candidates here before the second condition needs looking at.

These are 6 of 8 alphanumeric series questions in the bank. Attempt the rest with instant feedback in the practice drills, or under a clock in the mock tests.