NDA 2025 Mathematics question
How many 4-digit numbers that are divisible by 4 can be formed using the digits 1, 2, 3 and 4 (repetition of digits is not allowed)?
Answer: (B)
Solution
A number is divisible by 4 if the number formed by its last two digits is divisible by 4. With distinct digits from 1, 2, 3, 4 the possible
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