How many two-digit numbers are divisible by 5?

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RPF Constable 2024 Official Paper (Held On 03 Mar, 2025 Shift 1)
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  1. 19
  2. 20
  3. 17
  4. 18

Answer (Detailed Solution Below)

Option 4 : 18
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Detailed Solution

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Formula used:

To find the count of numbers divisible by 5 in a specific range, use the formula:

Count = last number - first number / 5 + 1

Calculation:

First two-digit number divisible by 5 = 10

Last two-digit number divisible by 5 = 95

Count = 95 - 10 / 5 + 1

⇒ Count = 85 / 5 + 1

⇒ Count = 17 + 1

⇒ Count = 18

∴ The correct answer is option (4).

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