In your case you need to check end digit sum 1, which depicts that if you divide number by 9 and remainder is 1, then its magic number. Hence, it can be written as:
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magic number or not, check whether an user givwn number is a magic number or not, check whether an user givsn number is a magic number or not, check whether an user givdn number is a magic number or not, check whether an user givrn number is a magic number or not, check whether an user giv4n number is a magic number or not