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Question

Select the alphanumeric clusters from among the given options that can replace the question mark (?) in the following series.

z1, x4, v9, t16, ?

The correct answer is

r25

Analyzing Alphanumeric Series Patterns

This question asks us to find the next term in a given alphanumeric series: z1, x4, v9, t16, ?

An alphanumeric series combines both letters and numbers, following a specific pattern or set of rules. To solve this, we need to analyze the pattern for the letters and the numbers separately.

Analyzing the Letter Pattern

Let's look at the letters in the series: z, x, v, t, ?

We can determine the pattern by looking at their positions in the English alphabet:

  • z is the 26th letter.
  • x is the 24th letter.
  • v is the 22nd letter.
  • t is the 20th letter.

Let's represent this in a table to see the sequence clearly:

LetterAlphabet Position
z26
x24
v22
t20


 

Observing the alphabet positions, we see a consistent pattern:

  • 26 → 24 (decreased by 2)
  • 24 → 22 (decreased by 2)
  • 22 → 20 (decreased by 2)

The pattern for the letters is decreasing by 2 positions in the alphabet each time.

Following this pattern, the next letter should be 2 positions before 't' (which is the 20th letter).

The position of the next letter will be \(20 - 2 = 18\).

The 18th letter of the English alphabet is 'r'.

Analyzing the Number Pattern

Now, let's look at the numbers in the series: 1, 4, 9, 16, ?

Let's examine the relationship between these numbers:

  • 1 can be written as \(1^2\).
  • 4 can be written as \(2^2\).
  • 9 can be written as \(3^2\).
  • 16 can be written as \(4^2\).

The pattern for the numbers is the square of consecutive positive integers starting from 1.

Following this pattern, the next number should be the square of the next integer in the sequence 1, 2, 3, 4.

The next integer is 5.

So, the next number in the series will be \(5^2 = 25\).

Combining the Patterns

By combining the patterns for the letters and the numbers, we find the next term in the series:

  • The next letter is 'r'.
  • The next number is 25.

Therefore, the next alphanumeric cluster in the series is r25.

Comparing with Options

Let's compare our derived term with the given options:

  • Option 1: r25
  • Option 2: t26
  • Option 3: s24
  • Option 4: v25

Our result, r25, matches Option 1.

Revision Table: Alphanumeric Series Analysis

Term in SeriesLetterLetter Pattern (Position)NumberNumber Pattern (Square)
z1z261\(1^2\)
x4x24 (26-2)4\(2^2\)
v9v22 (24-2)9\(3^2\)
t16t20 (22-2)16\(4^2\)
?r18 (20-2)25\(5^2\)

 

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Important Questions from Mixed Series

  1. Identify the correct option to complete the following series.

    5, 8, 13, 20, 29, ........., 53, 68, 85
  2. Select the alphanumeric-cluster from among the given options that can replace the question mark(?) in the following series.

    2D, 3I, 4P, ?

  3. From the given options, select the term that can replace the question mark (?) in the following series.

    A1, B27, C125, ?
  4. If all the special characters are dropped from the below arrangement, which of the following will be the 10th to the right of X?

    3 X ! I B O # F 4 5 * 1 K 2 $ 8 R 8 % Z

  5. How many such digits are there in the following sequence, each of which is immediately preceded as well as immediately followed by a letter?

    A B 7 C D 9 Z Y * P 2 M © K S 3 ↑ 5 N T 9

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