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(number system) self doubts

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when a number is divided by 13 ,the remainder is 11.when the same number is divided by 17,the remainder is 9.what is the number?
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so this question says N mod13=11 and Nmod17=9 we need to find that common N but i am also not able to figure out how to find that common N  so doing hit and trail i got 128 , 128mod13=11 and 128mod17= 9 so the correct answer would be 128
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