Write a letter to you younger brother congratulating him on succeeded in the primary scholarship examination.
Dear Hasan,
I hope this letter finds you well. I was happy to receive your letter dated the 15th of this month. I'm really excited to hear that you did really well in the primary scholarship examination. Congratulations on your amazing success! This news brings a lot of joy, and we are all proud of what you have achieved. Your excellent results have made me extremely happy.
I won't write much today. I hope everything is going well with you. Please send my best wishes to your parents and give my love to your younger sibling. As for me, I'm doing well.
I wish you all the best of luck in everything you do.
Take care.
Warm regards,
Sagor