"Five by five" as a math equation is 25 Was reading on Twitter that today is "Q day" on the clock, where the line drawn through the hour of 5, and the minute of 25, extends out to today. https://twitter.com/SaRaAshcraft/status/1078052526363160576 Seems weird I didn't notice it previously, but anyway, the line goes through 5 and 25, and "five by five" popped into my head, or "5 x 5" which = 25. Just another neat "coincidence", like a comment at Twitter mentioned that 5 pm in military time is 17:00, "Q o'clock".