![Squaring a number having 5 in the unit digit | Calculate in your mind | Learn Math with Zain - YouTube Squaring a number having 5 in the unit digit | Calculate in your mind | Learn Math with Zain - YouTube](https://i.ytimg.com/vi/kIetKdAYZv4/sddefault.jpg)
Squaring a number having 5 in the unit digit | Calculate in your mind | Learn Math with Zain - YouTube
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![PortlethenAcademySci on Twitter: "Needing some revision inspiration? Look no further! Here is a beautiful example of a mind map from one our S3 chemists in preparation for their unit 1 test next PortlethenAcademySci on Twitter: "Needing some revision inspiration? Look no further! Here is a beautiful example of a mind map from one our S3 chemists in preparation for their unit 1 test next](https://pbs.twimg.com/media/EjaDnFIXsAICeMB.jpg:large)