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The OTIS Excerpts
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![The OTIS Excerpts](/images/stories/virtuemart/product/resized/313423134_5330267883750834_8441353162521866557_n_400x400.jpg)
![The OTIS Excerpts](/images/stories/virtuemart/product/resized/313431860_5330267953750827_4246946105875629409_n_400x400.jpg)
![The OTIS Excerpts](/images/stories/virtuemart/product/resized/312218920_5330268293750793_6100905281265320184_n_400x400.jpg)
![The OTIS Excerpts](/images/stories/virtuemart/product/resized/312601709_5330268317084124_251216763901068329_n_400x400.jpg)
![The OTIS Excerpts](/images/stories/virtuemart/product/resized/312465602_5330268177084138_3312158518674725164_n_400x400.jpg)
![The OTIS Excerpts](/images/stories/virtuemart/product/resized/313113611_5330268113750811_4719356472294128421_n_400x400.jpg)
![The OTIS Excerpts](/images/stories/virtuemart/product/resized/313404536_5330268247084131_7633251094776621731_n_400x400.jpg)
![The OTIS Excerpts](/images/stories/virtuemart/product/resized/313424051_5330268367084119_4673155438712627320_n_400x400.jpg)
![The OTIS Excerpts](/images/stories/virtuemart/product/resized/314413657_5330268063750816_5267683515949711299_n_400x400.jpg)
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Tuyển tập 192 bài tập và lời giải từ các cuộc thi toán quốc tế như: IMO Shortlist, The William Lowell Putnam Mathematical Competition, “Team Selection Test Selection Test” của Mỹ, European Girl’s Math Olympiad, USA Math Olympiad.
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