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NDA 2024
Exam
NDA
Year
2024
Subject
Mathematics
Chapter
Permutation and Combination

NDA 2024 · Mathematics · Permutation and Combination

Four digit numbers are formed by using the digits 1,2,3,5 without...

Four digit numbers are formed by using the digits 1,2,3,51,2,3,5 without repetition of digits. How many of them are divisible by 4 ?

Options

  1. A120
  2. B24
  3. C12
  4. D6

Correct answer

D. 6

Step-by-step solution

We know that if last two digits of a number divisible by 4 then numbers divisible by 4. Hence, number is divisible by 4 =1×2×3×1=6=1 \times 2 \times 3 \times 1=6. \text{. }
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