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7. Rajah di bawah menunjukkan satu senarai nombor. The diagram show a list of numbers. \[ 13,15,17,21,27,29,33 \] Jumlahkan semua nombor perdana. Adakah hasil tambahnya juga nombor perdana?

Ask by Parry Lang. in Malaysia
Mar 11,2025

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The sum of the prime numbers \(13 + 17 + 29\) is \(59\), which is also a prime number.

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Mari kita lihat senarai nombor yang diberikan: \( 13, 15, 17, 21, 27, 29, 33 \). Dalam senarai ini, nombor perdana adalah \( 13, 17, 29 \). Jika kita jumlahkan nombor-nombor perdana ini, kita dapat: \[ 13 + 17 + 29 = 59 \] Sekarang, kita perlu semak jika \( 59 \) adalah nombor perdana. Nombor \( 59 \) hanya boleh dibahagikan oleh \( 1 \) dan \( 59 \) sahaja, oleh itu, \( 59 \) adalah nombor perdana. Jadi, hasil tambah nombor perdana dalam senarai ini juga merupakan nombor perdana!

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