Sent by Aref Mayahi from Iran

Sent by E.Nabeel Alhamdani from Yemen

↓This is question number 21↓
you can send for us your answers until 1 August

@worldmath

Send your solution to @mathcenter

Send your nice questions to @world_math

The names of who have solved question number 21:

A)

🏆Mohammed Alqottby from Yemen

🏆E.Nabeel Alhamdani from Yemen

🏆Ali Sadeghi from Iran

B)

🏆Mohammed Alqottby from Yemen

🏆E.Nabeel Alhamdani from Yemen

🏆Ali Sadeghi from Iran


@worldmath

A
Sent by E.Nabeel Alhamdani from Yemen

B
Sent by Mohammed Alqottby from Yemen

↓This is question number 22↓
you can send for us your answers until 22 August

@worldmath

B,C
#number_theory

Send your solution to @mathcenter

Send your nice questions to @world_math

The names of who have solved question number 22:

A)

🏆Mohammed Alqottby from Yemen

🏆E.Nabeel Alhamdani from Yemen

🏆Ali Sadeghi from Iran

🏆Ahmed Al-Aradi from Bahrain

B)

🏆Mohammed Alqottby from Yemen

🏆E.Nabeel Alhamdani from Yemen

🏆Ahmed Al-Aradi from Bahrain

C)

🏆Matteo from Italy

🏆Ali Sadeghi from Iran

🏆E.Nabeel Alhamdani from Yemen

@worldmath

Sent by E.Nabeel Alhamdani from Yemen

👇This is problem number 23👇
you can send for us your answers until 15 September

@worldmath

😊Send your solution to @mathcenter

🤔Send your nice questions to @world_math