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Question

What is the next number in the series?
100, 50, 25, ___

This question was previously asked in
SSC CGL 2025 Tier 2 Paper 1 Question Paper (19-Jan-2026)
The correct answer is

12.5

Series Pattern: 100, 50, 25

The task is to determine the next number in the sequence 100, 50, 25.

Identifying the Pattern

Examine the relationship between the numbers:

  • 100 to 50: Divide by 2 ($100 \div 2 = 50$).
  • 50 to 25: Divide by 2 ($50 \div 2 = 25$).

The consistent pattern observed is division by 2.

Calculating the Next Number

Apply the division pattern to the last term, 25:

Next Term = $25 \div 2$

Using LaTeX for the calculation:

$ \frac{25}{2} = 12.5 $

Thus, the next number in the series is 12.5.

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