This number counts the days of a week and the wonders on the traditional ancient list.

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Math & LogicOne small aha

Your new ahaThe Number 7

The Number 7: Widely regarded as a lucky or significant number across cultures. Source: 7 ↗

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22This number is called the number of the beast in the usual reading of Revelation 13:18.RECALL
The Number 666
The number 666 is named the number of the beast in the Book of Revelation.
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23This notation writes a nonzero number as a coefficient from 1 up to, but not including, 10 in magnitude, multiplied by a power of ten.RECALL
Scientific Notation
Scientific notation writes extreme values compactly as a number multiplied by a power of ten.
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24This numeral system combines letters such as I, V and X.RECALL
Roman Numerals
Roman numerals combine letters like I, V, and X, and still appear today on clocks and in movie credits.
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