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John was born on 15 August 2007. If Sia is 17 year older than John. On which day Sia was born?

Tuesday, Wednesday, Monday, Friday

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closed as off-topic by Gareth McCaughan Feb 11 at 15:19

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    $\begingroup$ Change your user name before some body catch you :-) $\endgroup$ – user56760 Feb 11 at 15:05
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    $\begingroup$ i wonder if this is off-topic? $\endgroup$ – Omega Krypton Feb 11 at 15:06
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If

Sia was literally 17 years older, that means she was born on August 15, 1990. This is a Wednesday which matches with John's birth date.

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  • $\begingroup$ Please tell me how suddenly did you get the answers is there any tricks to solve such problems (date related problems $\endgroup$ – user56760 Feb 11 at 15:20
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    $\begingroup$ I just looked up 2007 August calendars and 1990 August calendars to determine the day of the week :) @DiculSmerd $\endgroup$ – QuantumTwinkie Feb 11 at 15:22