When a number is divided by 7, the remainder is 2. What will be the remainder when the square of this number is divided by 7?

A 2

B 3

C 4

D 5

Solution

Correct Answer: Option B

*সঠিক উত্তর: b) 3
-যদি n কে 7 দিয়ে ভাগ করলে অবশিষ্ট থাকে 2, তাহলে n² কে 7 দিয়ে ভাগ করলে অবশিষ্ট হবে (2²) % 7 = 4।

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