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NDA 2019
Exam
NDA
Year
2019
Subject
Mathematics
Chapter
Basics of Mathematics

NDA 2019 · Mathematics · Basics of Mathematics

How many two-digit numbers are divisible by 4 ?

How many two-digit numbers are divisible by 4 ?

Options

  1. A21
  2. B22
  3. C24
  4. D25

Correct answer

B. 22

Step-by-step solution

First 2 digit number divisible by 4 is =12=12 Last 2 digit number divisible by 4 is =96=96. ∴ by AP concept 96=12+(n−1)4⇒n=96−124+1=22\begin{aligned} & \therefore \text{ by } A P \text{ concept } \\ & 96=12+(n-1) 4 \\ & \Rightarrow n=\frac{96-12}{4}+1=22 \end{aligned}
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