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Question

Select the term that will come next in the following series.

 $1O5$, $1P6$, $1Q7$, __________ 

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
$1R8$

Series Pattern Analysis

The question asks to identify the next term in the given series: $1O5$, $1P6$, $1Q7$. We need to analyze the pattern present in each term.

Each term consists of three parts: a leading digit, a letter, and a trailing digit.

  • Leading Digit: The first digit in each term is consistently '1'. ($1$O5, $1$P6, $1$Q7). Therefore, the next term will also start with '1'.
  • Letter: The letters follow a sequence in the alphabet: O, P, Q. These are consecutive letters. The letter following Q in the alphabet is R.
  • Trailing Digit: The trailing digits form a sequence of consecutive integers: 5, 6, 7. The integer following 7 is 8.

Combining these observations, the next term in the series is formed by taking the constant leading digit '1', the next letter 'R', and the next digit '8'.

Thus, the next term is $1R8$. This corresponds to Option 1.

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