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Question

A series is given with one term wrong. Select that wrong term from the given alternatives.

J12, M24, P48, S96, U192

The correct answer is

U192

Analyzing the Series Pattern

The given series is J12, M24, P48, S96, U192. We need to find the term that does not follow the established pattern. The series consists of a letter followed by a number.

Letter Sequence Analysis

Let's examine the letters in the series: J, M, P, S, U.

We find their positions in the English alphabet:

  • J is the 10th letter.
  • M is the 13th letter.
  • P is the 16th letter.
  • S is the 19th letter.
  • U is the 21st letter.

Now, let's look at the difference in positions between consecutive letters:

  • M (13) - J (10) = 3
  • P (16) - M (13) = 3
  • S (19) - P (16) = 3

The pattern observed is that each subsequent letter's position in the alphabet increases by 3.

Following this pattern, the letter after S (19) should be the one at position $19 + 3 = 22$. The 22nd letter of the alphabet is V.

However, the series contains U (the 21st letter) instead of V.

The difference between S and U is $21 - 19 = 2$. This breaks the established '+3' pattern.

Number Sequence Analysis

Let's examine the numbers in the series: 12, 24, 48, 96, 192.

We observe the relationship between consecutive numbers:

  • 24 / 12 = 2
  • 48 / 24 = 2
  • 96 / 48 = 2
  • 192 / 96 = 2

The number sequence follows a consistent pattern where each number is double the previous number (multiplied by 2).

Identifying the Incorrect Term

The number pattern (multiplying by 2) is consistent throughout the series.

The letter pattern is consistent up to S, showing an increment of 3 positions ($J \rightarrow M \rightarrow P \rightarrow S$). However, the series deviates from this pattern with the letter U.

According to the '+3' letter pattern, the term following S96 should be V192 (since S is the 19th letter, $19 + 3 = 22$, which is V, and $96 \times 2 = 192$).

The series presents U192. Since the number 192 fits the numerical pattern, the discrepancy lies with the letter U.

Therefore, the term U192 is the incorrect term in the series because the letter U does not follow the established alphabetical sequence progression.

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Important Questions from Number Series

  1. What will come in place of question mark (?) in the following number series?

    2, 5, 11, 23, 44, 77, ?

  2. What will come in place of question mark (?) in the following number series?

    31, 32, 36, ?, 61, 86

  3. What will come in the place of question mark (?) in the following number series?

    3, 6, 18, ?, 630, 6930

  4. What should come in place of the question mark ‘?’ in the following number series?

    60, 40, 50, ?, 180, 460

  5. In the following question, select the related number pair from the given alternatives.

    144 : 400 :: ?

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