When x is divided by 13, the answer is y with a remainder of 3. When x is divided by 7, the answer is z with a remainder of 3. If x, y, and z are all possible integers, what is the remainder of \(yz/13\)?
A. 0
B. 3
C. 4
D. 7
E. none of these
Explanation: \(x = 13y + 3\) এবং \(x = 7z + 3\)। সুতরাং, \(13y = 7z\)। যেহেতু 13 এবং 7 দুটি prime number, তাই \(y\) অবশ্যই 7 এর গুণিতক হবে এবং \(z\) অবশ্যই 13 এর গুণিতক হবে। সবচেয়ে ছোট ধনাত্মক পূর্ণসংখ্যাগুলির জন্য, \(y = 7\) এবং \(z = 13\)। \(\frac{yz}{13} = \frac{7 \times 13}{13} = 7\)। \(yz/13\) কে ভাগ করলে ভাগশেষ 7 হবে।
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