On dividing a number by 5 , we get 3 as remainder. What will the remainder when the square of this number is divided by 5?

On dividing a number by 5 , we get 3 as remainder. What will the remainder when the square of this number is divided by 5? Correct Answer 4

ধরি, সংখ্যাটি ৮,৮ কে ৫ দ্বারা ভাগ করলে ভাগশেষ = ৩ ৮ এর বর্গ = ৮ × ৮ = ৬৪ ৬৪ কে ৫ দ্বারা ভাগ করলে ভাগশেষ = ৪ অর্থাৎ কোন সংখ্যাকে ৫ দ্বারা ভাগ করলে ভাগশেষ ৩ হলে, ঐ সংখ্যার বর্গকে ৫ দ্বারা ভাগ করলে ভাগশেষ ৪ হবে।
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