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# PEN global

Problems in Elementary Number Theory 2 [ 2009 ] No. 1

 Bangla Tarik Adnan Moon Bosnian Harun Šiljak Chinese Croatian Harun Šiljak English TeX Greek Silouanos Brazitikos Mongolian Undrah Batzorig Romanian Catalin Turcas Serbian [Latin] Harun Šiljak Serbian [Cyrillic] Harun Šiljak Vietnamese Sơn Hồng Tạ

Problems in Elementary Number Theory 1 [ 2008 ] No. 1

 Bangla Tarik Adnan Moon Bosnian Harun Šiljak Chinese Delong Meng Croatian Harun Šiljak English TeX Greek Silouanos Brazitikos Mongolian Undrah Batzorig Romanian Catalin Turcas Serbian [Latin] Harun Šiljak Serbian [Cyrillic] Harun Šiljak Vietnamese Sơn Hồng Tạ

PEN global is the first step of the translations of  PEN Problems Book.

If you want to contribute Project PEN by translating PEN Problems Book in your language, then please feel free to contact PEN Team at pen@problem-solving.be .

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### 5 Responses

1. […] G […]

2. Hello ! Please help me to solving this problem

find a , b , c , d , e if : abcde X 4 = edcba

3. 21978 x 4 = 87912
abcde x 4 = edcba

4. Thanks you very much. see you later

5. Problem of The day

1/ know that:
12321=11 X 11 and 123021=351 X 351
Find M=abc…yz and N if 123M21= N X N

2/ Know that :
144 = 12 X 12 and 1444 = 38 X 38
Find n and P if : 1444…444 = P X P ( n=444….444 )

Good luck !